chore: update changelog draft

CHANGELOG_DRAFT.md

@@ -1,4 +1,10 @@
-## v3.5.4
+## v3.6.0
 
-- Deprecated the setter of `enableReactionsSupergroup` in `SendbirdUIKitContainerProps`, which is not allowed by default. If you wish to use this feature,
-  [contact us](https://dashboard.sendbird.com/auth/signin?next=/settings/contact_us?category=feedback_and_feature_requests&product=UIKit&subject=%5BFeature%20Request%5D%20Enable%20reactions%20for%20supergroup%20in%20UIKit).
+### Features
+
+- **uikit:** added GroupChannelThreadFragment
+
+### Bug Fixes
+
+- fixed issue with mention suggestion list sorting
+- fixed issue with file upload size limit exceeded