docs(changelog): update changelog

CHANGELOG.md

@@ -5,6 +5,16 @@ All notable changes to this project will automatically be documented in this fil
 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).
 
+## v0.4.1 - 2024-04-12
+
+### What's Changed
+
+#### 🐛 Bug Fixes
+
+* bug: remove_source_branch_after_merge, default should be true (#12) @Plork
+
+**Full Changelog**: https://github.com/schubergphilis/terraform-gitlab-mcaf-project/compare/v0.4.0...v0.4.1
+
 ## v0.4.0 - 2024-04-12
 
 ### What's Changed