Prepare changelog for v3.84.0

Author: RiotRobot

CHANGELOG.md

@@ -1,5 +1,5 @@
-Changes in [3.84.0-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.84.0-rc.1) (2023-10-31)
-===============================================================================================================
+Changes in [3.84.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.84.0) (2023-11-07)
+=====================================================================================================
 
 ## ✨ Features
  * Knock on a ask-to-join room if a module wants to join the room when navigating to a room ([\#11787](https://github.com/matrix-org/matrix-react-sdk/pull/11787)). Contributed by @dhenneke.
@@ -11,6 +11,7 @@ Changes in [3.84.0-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases
  * OIDC: add friendly errors ([\#11184](https://github.com/matrix-org/matrix-react-sdk/pull/11184)). Fixes vector-im/element-web#25665. Contributed by @kerryarchibald.
 
 ## 🐛 Bug Fixes
+ * Fix rightpanel hiding scrollbar ([\#11831](https://github.com/matrix-org/matrix-react-sdk/pull/11831)). Contributed by @kerryarchibald.
  * Fix multi-tab session lock on Firefox not being cleared ([\#11800](https://github.com/matrix-org/matrix-react-sdk/pull/11800)). Fixes vector-im/element-web#26165. Contributed by @ManuelHu.
  * Deserialise spoilers back into slash command form ([\#11805](https://github.com/matrix-org/matrix-react-sdk/pull/11805)). Fixes vector-im/element-web#26344.
  * Fix Incorrect message scaling for verification request ([\#11793](https://github.com/matrix-org/matrix-react-sdk/pull/11793)). Fixes vector-im/element-web#24304. Contributed by @capGoblin.