chore: Update changelog for release 2.0.0-alpha.0

CHANGELOG.md

@@ -5,11 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased]
+## [2.0.0-alpha.0] - 2023-01-08
 
 ### Changed
 
-- Combine all actions into a single action. **_Breaking_**
+- Combine all actions into a single action. ***Breaking***
 
 ## [1.4.1] - 2022-11-28
 
@@ -68,6 +68,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Initial content including change log
 
+[2.0.0-alpha.0]: https://github.com/release-flow/keep-a-changelog-action/compare/v1.4.1...v2.0.0-alpha.0
+
 [1.4.1]: https://github.com/release-flow/keep-a-changelog-action/compare/v1.4.0...v1.4.1
 
 [1.4.0]: https://github.com/release-flow/keep-a-changelog-action/compare/v1.3.0...v1.4.0