update changelog for production decomposition

Author: isc-pbarton

CHANGELOG.md

@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added 'git push --force' in expert mode (#527)
 - Add remote repository to settings page (#448)
 - Added environment awareness in configuration, and showing of environment name in UI (#124)
+- Production Decomposition mode allows controlling interoperability productions as individual files for each host (#469)
 
 ### Fixed
 - Fixed display of other users' username in workspace view on Unix (#530)