update changelog for v0.5.4

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.5.4] (2025-02-04)
+
+### Changed
+
+- **Performance**: Middleware initialization now requires less heap allocation.
+- **Performance**: Middleware's Config method now requires less heap allocation.
+
 ## [0.5.3] (2025-01-24)
 
 ### Changed
@@ -167,6 +174,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [0.1.0] (2024-03-23)
 
+[0.5.4]: https://github.com/jub0bs/cors/compare/v0.5.3...v0.5.4
 [0.5.3]: https://github.com/jub0bs/cors/compare/v0.5.2...v0.5.3
 [0.5.2]: https://github.com/jub0bs/cors/compare/v0.5.1...v0.5.2
 [0.5.1]: https://github.com/jub0bs/cors/compare/v0.5.0...v0.5.1