Update CHANGELOG.md

Author: danney-chun

CHANGELOG.md

@@ -5,20 +5,7 @@
 - Deprecated `customTypeFilters` in `UnreadItemCountParams`
 - Added `customTypesFilter` in `UnreadItemCountParams`
 
-### **Feature**
-Support `pinned message` in `OpenChannel`
-- Added `pinnedMessageIds` property in `BaseChannel`
-- Added `createPinnedMessageListQuery` method in `BaseChannel`
-- Added `pinMessage` method in `BaseChannel`
-- Added `unpinMessage` method in `BaseChannel`
-- Added `lastPinnedMessage` property in `OpenChannel`
-- Added `onPinnedMessageUpdated` in `OpenChannelHandler`
-
-
-### **Improvements**
-- Added `customTypeFilters` in `UnreadItemCountParams`
 ## v4.14.0 (Aug 07, 2024)
-
 ### **Feature**
 Support `pinned message` in `OpenChannel`
 - Added `pinnedMessageIds` property in `BaseChannel`