Update CHANGELOG.md

Author: ksaduest

Diff for: CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Pull event handler that does an IPM uninstall and load to handle deletes (#631)
 - Partial support for production decomposition with the new interoperability editors
+- Added Lock Branch setting to prevent switching branches for a protected namespace (#709)
 
 ### Fixed
 - Favorites links for Git pages now works on recent IRIS versions (#734)