Prepare changelog for v3.14.0

Author: RiotRobot

CHANGELOG.md

@@ -1,3 +1,11 @@
+Changes in [3.14.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.14.0) (2021-02-16)
+=====================================================================================================
+[Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v3.14.0-rc.1...v3.14.0)
+
+ * Upgrade to JS SDK 9.7.0
+ * [Release] Use config for host signup branding
+   [\#5651](https://github.com/matrix-org/matrix-react-sdk/pull/5651)
+
 Changes in [3.14.0-rc.1](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.14.0-rc.1) (2021-02-10)
 ===============================================================================================================
 [Full Changelog](https://github.com/matrix-org/matrix-react-sdk/compare/v3.13.1...v3.14.0-rc.1)