update of release_notes.md implementing review feedback

Author: I750911

docs/release-notes/release_notes.md

@@ -8,7 +8,7 @@
 
 ### 🔧 Compatibility Notes
 
-- `ChatMessage`, as well as new `MultiChatMessage`, are now subtypes of new interface `ChatMessagesInner`. This may cause type inconsistencies in existing codebase. 
+- `ChatMessage`, as well as new `MultiChatMessage`, are now subtypes of new interface `ChatMessagesInner`. Most variables or methods previously typed as `ChatMessage` in `model` package are now typed as `ChatMessagesInner`. 
 
 ### ✨ New Functionality