add v2.1.0 to changelog

Author: filisko

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [2.1.0] - 2025-03-21
+### Added
+- Support for PHP 8.4
+
 ## [2.0.3] - 2025-03-06
 ### Added
 - Support for psr/http-message 2 [#14]
@@ -94,6 +98,7 @@ First version
 [#13]: https://github.com/middlewares/request-handler/issues/13
 [#14]: https://github.com/middlewares/request-handler/issues/14
 
+[2.1.0]: https://github.com/middlewares/request-handler/compare/v2.0.3...v2.1.0
 [2.0.3]: https://github.com/middlewares/request-handler/compare/v2.0.2...v2.0.3
 [2.0.2]: https://github.com/middlewares/request-handler/compare/v2.0.1...v2.0.2
 [2.0.1]: https://github.com/middlewares/request-handler/compare/v2.0.0...v2.0.1