fix link typo

Author: krollins-mdb

source/deprecation.txt

@@ -78,7 +78,7 @@ their codebases. Check out the community branches for the following SDKs:
 
 - `C++ <https://github.com/realm/realm-cpp/tree/community>`__
 - `Flutter <https://github.com/realm/realm-dart/tree/community>`__
-- `Kotlin <https://github.com/realm/realm-kotlin/tree/communityn>`__
+- `Kotlin <https://github.com/realm/realm-kotlin/tree/community>`__
 - `.NET <https://github.com/realm/realm-dotnet/tree/community>`__
 - `JavaScript <https://github.com/realm/realm-js/tree/community>`__
 - `Swift <https://github.com/realm/realm-swift/tree/community>`__