Prepare changelog for v3.45.0

Author: RiotRobot

CHANGELOG.md

@@ -1,11 +1,5 @@
-Changes in [3.45.0-rc.3](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.45.0-rc.3) (2022-05-20)
-===============================================================================================================
-
-## 🐛 Bug Fixes
- * Fix crash on null idp for SSO buttons ([\#8650](https://github.com/matrix-org/matrix-react-sdk/pull/8650)).
-
-Changes in [3.45.0-rc.2](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.45.0-rc.2) (2022-05-17)
-===============================================================================================================
+Changes in [3.45.0](https://github.com/matrix-org/matrix-react-sdk/releases/tag/v3.45.0) (2022-05-24)
+=====================================================================================================
 
 ## ✨ Features
  * Go to space landing page when clicking on a selected space ([\#6442](https://github.com/matrix-org/matrix-react-sdk/pull/6442)). Fixes vector-im/element-web#20296.