[Crashlytics] Updated changelog entry for 10.28.1 (#13175)

Author: andrewheard

Crashlytics/CHANGELOG.md

@@ -1,5 +1,5 @@
 # 10.28.1
-- [changed] Reverted "Add SIGTERM support (#12881)" (#13117)
+- [fixed] Reverted "Add SIGTERM support (#12881)" introduced in version 10.27.0 (#13117).
 
 # 10.28.0
 - [fixed] Created a new queue for rollouts persistence writes and made sure rollouts logging queue is not nil while dispatching (#12913).