Update the link pointing to main branch (#1753)

* update the spec link pointing to main branch)

* update community repo links

CONTRIBUTING.md

@@ -12,12 +12,12 @@ meeting or get in touch on
 
 Even though, anybody can contribute, there are benefits of being a member of our
 community. See to the [community membership
-document](https://github.com/open-telemetry/community/blob/master/community-membership.md)
+document](https://github.com/open-telemetry/community/blob/main/community-membership.md)
 on how to become a
-[**Member**](https://github.com/open-telemetry/community/blob/master/community-membership.md#member),
+[**Member**](https://github.com/open-telemetry/community/blob/main/community-membership.md#member),
-[**Approver**](https://github.com/open-telemetry/community/blob/master/community-membership.md#approver)
+[**Approver**](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver)
 and
-[**Maintainer**](https://github.com/open-telemetry/community/blob/master/community-membership.md#maintainer).
+[**Maintainer**](https://github.com/open-telemetry/community/blob/main/community-membership.md#maintainer).
 
 ## Find a Buddy and Get Started Quickly
 
@@ -149,9 +149,9 @@ Open a pull request against the main `opentelemetry-dotnet` repo.
 A PR is considered to be **ready to merge** when:
 
 * It has received approval from
-  [Approvers](https://github.com/open-telemetry/community/blob/master/community-membership.md#approver).
+  [Approvers](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver).
   /
-  [Maintainers](https://github.com/open-telemetry/community/blob/master/community-membership.md#maintainer).
+  [Maintainers](https://github.com/open-telemetry/community/blob/main/community-membership.md#maintainer).
 * Major feedbacks are resolved.
 * It has been open for review for at least one working day. This gives people
   reasonable time to review.

README.md

@@ -98,7 +98,7 @@ Approvers
 * [Reiley Yang](https://github.com/reyang), Microsoft
 
 *Find more about the approver role in [community
-repository](https://github.com/open-telemetry/community/blob/master/community-membership.md#approver).*
+repository](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver).*
 
 Maintainers
 ([@open-telemetry/dotnet-maintainers](https://github.com/orgs/open-telemetry/teams/dotnet-maintainers)):
@@ -110,7 +110,7 @@ Maintainers
 * [Sergey Kanzhelev](https://github.com/SergeyKanzhelev), Google
 
 *Find more about the maintainer role in [community
-repository](https://github.com/open-telemetry/community/blob/master/community-membership.md#maintainer).*
+repository](https://github.com/open-telemetry/community/blob/main/community-membership.md#maintainer).*
 
 ### Thanks to all the people who have contributed
 

src/OpenTelemetry.Api/Internal/SemanticConventions.cs

@@ -23,7 +23,7 @@ namespace OpenTelemetry.Trace
     internal static class SemanticConventions
     {
         // The set of constants matches the specification as of this commit.
-        // https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/trace/semantic_conventions
+        // https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/trace/semantic_conventions
         // https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/trace/semantic_conventions/exceptions.md
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
         public const string AttributeNetTransport = "net.transport";

src/OpenTelemetry.Api/README.md

@@ -39,9 +39,9 @@ API](https://github.com/open-telemetry/opentelemetry-specification/blob/main/spe
 [Metrics
 API](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/api.md),
 [Context and Propagation
-API](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/context),
+API](https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/context),
 and a set of [semantic
-conventions](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/trace/semantic_conventions).
+conventions](https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/trace/semantic_conventions).
 
 ### Tracing API
 
@@ -174,7 +174,7 @@ here as well.
     this activity are protected with a null check.
 
 4. Populate activity with tags following the [OpenTelemetry semantic
-   conventions](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/trace/semantic_conventions).
+   conventions](https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/trace/semantic_conventions).
    It is highly recommended to check `activity.IsAllDataRequested`, before
    populating any tags which are not readily available. `IsAllDataRequested` is
    the same as

src/OpenTelemetry/CHANGELOG.md

@@ -65,7 +65,7 @@ Released 2020-Nov-17
   `TracerProviderBuilder.SetResourceBuilder`.
   ([#1533](https://github.com/open-telemetry/opentelemetry-dotnet/pull/1533))
 * By default `TracerProvider` will set a `Resource` containing [Telemetry
-    SDK](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/resource/semantic_conventions#telemetry-sdk)
+    SDK](https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/resource/semantic_conventions#telemetry-sdk)
     details
     ([#1533](https://github.com/open-telemetry/opentelemetry-dotnet/pull/1533)):
   * `telemetry.sdk.name` = `opentelemetry`

src/OpenTelemetry/README.md

@@ -213,7 +213,7 @@ logging, by supporting `Activity` and `LogRecord` respectively.*
 is the immutable representation of the entity producing the telemetry. If no
 `Resource` is explicitly configured, the default is to use a resource indicating
 this [Telemetry
-SDK](https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/resource/semantic_conventions#telemetry-sdk).
+SDK](https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/resource/semantic_conventions#telemetry-sdk).
 `SetResourceBuilder` method on `TracerProviderBuilder` can be used to set a
 `ResourceBuilder` on the provider. When the provider is built, it automatically
 builds the final `Resource` from the configured `ResourceBuilder`. As with

src/OpenTelemetry/Resources/ResourceBuilderExtensions.cs

@@ -36,7 +36,7 @@ namespace OpenTelemetry.Resources
         /// <summary>
         /// Adds service information to a <see cref="ResourceBuilder"/>
         /// following <a
-        /// href="https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/resource/semantic_conventions#service">semantic
+        /// href="https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/resource/semantic_conventions#service">semantic
         /// conventions</a>.
         /// </summary>
         /// <param name="resourceBuilder"><see cref="ResourceBuilder"/>.</param>
@@ -89,7 +89,7 @@ namespace OpenTelemetry.Resources
         /// <summary>
         /// Adds service information to a <see cref="ResourceBuilder"/>
         /// following <a
-        /// href="https://github.com/open-telemetry/opentelemetry-specification/tree/master/specification/resource/semantic_conventions#telemetry-sdk">semantic
+        /// href="https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/resource/semantic_conventions#telemetry-sdk">semantic
         /// conventions</a>.
         /// </summary>
         /// <param name="resourceBuilder"><see cref="ResourceBuilder"/>.</param>