Update CHANGELOG.md

Author: Art4

CHANGELOG.md

@@ -7,7 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/kbsali/php-redmine-api/compare/v2.8.0...v2.x)
 
-Nothing yet.
+### Changed
+
+- Behaviour-driven tests are run against Redmine 6.0.7, 5.1.10, 5.0.14.
 
 ## [v2.8.0](https://github.com/kbsali/php-redmine-api/compare/v2.7.0...v2.8.0) - 2025-05-30