fix changelog

Author: LucaMarconato

CHANGELOG.md

@@ -8,12 +8,18 @@ and this project adheres to [Semantic Versioning][].
 [keep a changelog]: https://keepachangelog.com/en/1.0.0/
 [semantic versioning]: https://semver.org/spec/v2.0.0.html
 
-## [0.2.1] - 2024-xx-xx
+## [0.2.2] - 2024-05-02
 
 ### Fixed
 
 -   Fixed `fill_alpha` ignoring `alpha` channel from custom cmap
 
+## [0.2.1] - 2024-03-26
+
+### Minor
+
+-   Adjusted GitHub worklows
+
 ## [0.2.0] - 2024-03-24
 
 ### Added