add v0.5.4 to changelog

CHANGELOG.md

@@ -13,6 +13,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [v0.5.4] - 2024-06-03
+
+### Fixed
+
+- add description of classes, see [!65](https://codebase.helmholtz.cloud/dasf/dasf-messaging-python/-/merge_requests/65)
+
 ## [v0.5.3] - 2024-05-06
 
 ### Fixed