Update changelog

CHANGELOG.md

@@ -2,9 +2,18 @@
 
 # [2.15.0] - 2023-10-30
 
-### Added
+### Fixed
+- iOS: Use message content APIs (#842)
+- Android: Fix crash due to out of bounds error (#845)
 
+### Added
 - iOS: Add "shouldReplaceText" API to ignore keyboard input (#857)
+- iOS: Add getMentionsState API (#850)
+- Common: get_mentions_state() implemented on the Rust side (#849)
+- Android: Handle and track more internal exceptions (#846)
+- iOS: Expose the set at room mention function (#843)
+- iOS: Enhanced `MentionDisplayHelper` (#840) 
+- Android: Add rich text styled view (#837)
 
 # [2.14.1] - 2023-10-04