small typo fix (#903)

Signed-off-by: tomsft <138026577+tomsft@users.noreply.github.com>

daprdocs/content/en/java-sdk-docs/_index.md

@@ -317,7 +317,7 @@ try (DaprClient client = (new DaprClientBuilder()).build()) {
 - Visit [Java SDK examples](https://github.com/dapr/java-sdk/tree/master/examples/src/main/java/io/dapr/examples/secrets) for code samples and instructions to try out retrieving secrets
 
 ### Actors
-An actor is an isolated, independent unit of compute and state with single-threaded execution. Dapr provides an actor implementation based on the [Virtual Actor pattern](https://www.microsoft.com/en-us/research/project/orleans-virtual-actors/), which provides a single-threaded programming model and where actors are garbage collected when not in use. With Dapr's implementaiton, you write your Dapr actors according to the Actor model, and Dapr leverages the scalability and reliability that the underlying platform provides. 
+An actor is an isolated, independent unit of compute and state with single-threaded execution. Dapr provides an actor implementation based on the [Virtual Actor pattern](https://www.microsoft.com/en-us/research/project/orleans-virtual-actors/), which provides a single-threaded programming model and where actors are garbage collected when not in use. With Dapr's implementation, you write your Dapr actors according to the Actor model, and Dapr leverages the scalability and reliability that the underlying platform provides. 
 
 ```java
 import io.dapr.actors.ActorMethod;