Update CHANGELOG.md

Author: GrahamCampbell

CHANGELOG.md

@@ -8,6 +8,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [11.9.0] - 2023-03-XX
 
 * Add PHP 8.2 support
+* Add support for group and project deploy tokens
+* Add source parameter to pipelines API
+* Add support for `Groups::issues`
+* Add support for `Groups::iterations`
+* Add support for `Projects::iterations`
+* Add support for `Projects::pipelineTestReport`
+* Add support for `Projects::pipelineTestReportSummary`
+* Added support for `update_at` order by in `Projects::pipelines`
+* Added additional parameters to `Issues::all`
+* Added additional parameters to `Issues::group`
 
 ## [11.8.0] - 2022-04-24