Updating CHANGELOG for 4.2.0.

Author: cyrilverloop

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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [4.2.0] - 2024-05-13
+### Added
+- Community training medium configurations.
+
 ## [4.1.0] - 2024-04-22
 ### Added
 - Community training easy configurations.