chore: update CHANGELOG

Author: hpopp

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 **Fixed**
 
 - Return `:permission_denied` FCM error response if missing privileges. ([#290](https://github.com/codedge-llc/pigeon/pull/290))
+- Better handling of FCM errors with multiple details. ([#293](https://github.com/codedge-llc/pigeon/pull/293))
 - Minor documentation fixes. ([#294](https://github.com/codedge-llc/pigeon/pull/294))
 
 ## v2.0.1 - 2024-12-28