Update CHANGELOG.md

Author: GrahamCampbell

CHANGELOG.md

@@ -7,6 +7,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [11.5.0] - UPCOMING
 
+* Added support for filtering environments by state
+* Added support for approval rules endpoints
+* Added support for toggling the activate state of users
+* Added support for managing packages
+* Added support for filtering projects by topics
+* Added support for locked merge requests
+* Added support for filtering groups and projects by user
+* Added support for removing protected branches
+* Added support for `psr/cache:^2.0`
+* Added support for `symfony/options-resolver:^6.0`
+
 [11.5.0]: https://github.com/GitLabPHP/Client/compare/11.4.1...11.5.0
 
 ## [11.4.1] - 2021-12-26