Update Documentation (#1189)

Fix broken link to JoinExample.

Author: kw2542

docs/learn/documentation/versioned/api/high-level-api.md

@@ -56,7 +56,7 @@ Samza's flexible High Level Streams API lets you describe your complex stream pr
 
 - The [Filter example](https://github.com/apache/samza-hello-samza/blob/latest/src/main/java/samza/examples/cookbook/FilterExample.java) demonstrates how to perform stateless operations on a stream. 
 
-- The [Join example](https://github.com/apache/samza-hello-samza/blob/latest/src/main/java/samza/examples/cookbook/JoinExample.java]) demonstrates how you can join a Kafka stream of page-views with a stream of ad-clicks
+- The [Join example](https://github.com/apache/samza-hello-samza/blob/latest/src/main/java/samza/examples/cookbook/JoinExample.java) demonstrates how you can join a Kafka stream of page-views with a stream of ad-clicks
 
 - The [Stream-Table Join example](https://github.com/apache/samza-hello-samza/blob/latest/src/main/java/samza/examples/cookbook/RemoteTableJoinExample.java) demonstrates how to use the Samza Table API. It joins a Kafka stream with a remote dataset accessed through a REST service.