Update CHANGELOG.md

CHANGELOG.md

@@ -12,9 +12,11 @@ You should also include the user name that made the change.
 ## 12.x.x (unreleased)
 
 ### Improvements
+- Server: Add rate limit to i/notifications @tamaina
 
 ### Bugfixes
-- Fix GenerateVideoThumbnail failed @mei23
+- Server: Fix GenerateVideoThumbnail failed @mei23
+- Server: Ensure temp directory cleanup @Johann150
 
 ## 12.111.1 (2022/06/13)