Update version tag after 0.3.0 release (#1129)

* Update version tag after 0.3.0 release

* add test to force us updating it

docs/releasing.md

@@ -8,6 +8,8 @@
    - [`src/OpenTelemetry.AutoInstrumentation.Native/otel_profiler_constants.h`](../src/OpenTelemetry.AutoInstrumentation.Native/otel_profiler_constants.h)
    - [`src/OpenTelemetry.AutoInstrumentation.Native/version.h`](../src/OpenTelemetry.AutoInstrumentation.Native/version.h)
    - [`src/OpenTelemetry.AutoInstrumentation/OpenTelemetry.AutoInstrumentation.csproj`](../src/OpenTelemetry.AutoInstrumentation/OpenTelemetry.AutoInstrumentation.csproj)
+   - ['src/OpenTelemetry.AutoInstrumentation\Constants.cs'](../src/OpenTelemetry.AutoInstrumentation\Constants.cs)
+     (Version tag)
 
 1. Update the documentation link on the [README.md](./README.md) file.
 

src/OpenTelemetry.AutoInstrumentation/Constants.cs

@@ -21,7 +21,7 @@ internal static class Constants
     public static class Tracer
     {
         public const string Language = "dotnet";
-        public const string Version = "0.2.0";
+        public const string Version = "0.3.0";
     }
 
     public static class ConfigurationValues

test/OpenTelemetry.AutoInstrumentation.Tests/ConstantsTests.cs

@@ -0,0 +1,29 @@
+// <copyright file="ConstantsTests.cs" company="OpenTelemetry Authors">
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// </copyright>
+
+using FluentAssertions;
+using Xunit;
+
+namespace OpenTelemetry.AutoInstrumentation.Tests;
+
+public class ConstantsTests
+{
+    [Fact]
+    public void VersionTag()
+    {
+        Constants.Tracer.Version.Should().Be(typeof(Constants).Assembly.GetName().Version?.ToString(fieldCount: 3));
+    }
+}