Update CHANGELOG.md

Author: snarky-snark

CHANGELOG.md

@@ -3,7 +3,11 @@ 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).
 
-## [Unrelease]
+## [Unreleased]
+
+## [0.15.4] - 2024-05-10
+### Fixed
+- Fix broken var.set (see #114).
 
 ## [0.15.3] - 2024-04-17
 ### Fixed
@@ -166,7 +170,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Variable updates occur when the state of any tracked entity changes.
 - README with initial documentation.
 
-[Unreleased]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.3...develop
+[Unreleased]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.4...develop
+[0.15.3]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.3...v0.15.4
 [0.15.3]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.2...v0.15.3
 [0.15.2]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.1...v0.15.2
 [0.15.1]: https://github.com/snarky-snark/home-assistant-variables/compare/v0.15.0...v0.15.1