CHANGELOG.md in m2m_keygen-0.2.0 vs CHANGELOG.md in m2m_keygen-0.2.1

@@ -5,13 +5,20 @@
 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).
 
 ## [Unreleased]
 
+## [0.2.1]
+
+### Added
+
+- Good link to documentation
+
 ## [0.2.0]
 
 ### Added
 
 - Basic skeleton for gem
 
-[unreleased]: https://github.com/Billcorporate/m2m_keygen_ruby/compare/v0.2.0...HEAD
+[unreleased]: https://github.com/Billcorporate/m2m_keygen_ruby/compare/v0.2.1...HEAD
+[0.2.1]: https://github.com/Billcorporate/m2m_keygen_ruby/releases/tag/v0.2.1
 [0.2.0]: https://github.com/Billcorporate/m2m_keygen_ruby/releases/tag/v0.2.0