Prepare changelog for v3.22.0

Author: RiotRobot

CHANGELOG.md

@@ -1,3 +1,11 @@
+Changes in [3.22.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.22.0) (2021-05-24)
+=====================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v3.22.0-rc.1...v3.22.0)
+
+ * Upgrade to JS SDK 11.1.0
+ * [Release] Bump libolm version
+   [\#6087](https://github.com/matrix-org/matrix-react-sdk/pull/6087)
+
 Changes in [3.22.0-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.22.0-rc.1) (2021-05-19)
 ===============================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v3.21.0...v3.22.0-rc.1)