Update CHANGELOG.md

Author: nuno-vieira

CHANGELOG.md

@@ -4,6 +4,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 # Upcoming
 
 ## StreamChat
+### ✅ Added
+- Add `SendMessageInterceptor` to intercept send message requests [#3671](https://github.com/GetStream/stream-chat-swift/pull/3671)
+- Add `ChatMessage.changing()` to allow overriding message data temporarily [#3671](https://github.com/GetStream/stream-chat-swift/pull/3671)
 ### 🐞 Fixed
 - Fix swipe to reply enabled when quoting a message is disabled [#3662](https://github.com/GetStream/stream-chat-swift/pull/3662)
 - Fix shadowed messages increasing the channel messages unread count [#3665](https://github.com/GetStream/stream-chat-swift/pull/3665)