release: Update CHANGELOG.md for 0.4.0

Author: ManifoldFR

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.4.0] - 2025-06-10
+
 ### Added
 
 - multibody/Visualizer : add frame visualization
@@ -156,7 +158,8 @@ This is the first release to use a changelog.
 - Visual bug (uninitialized data) when disabling SSAO
 
 
-[Unreleased]: https://github.com/Simple-Robotics/candlewick/compare/v0.3.1...HEAD
+[Unreleased]: https://github.com/Simple-Robotics/candlewick/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/Simple-Robotics/candlewick/compare/v0.3.1...v0.4.0
 [0.3.1]: https://github.com/Simple-Robotics/candlewick/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/Simple-Robotics/candlewick/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/Simple-Robotics/candlewick/compare/v0.1.1...v0.2.0