prepare for release

Author: nadar

core/CHANGELOG.md

@@ -3,7 +3,7 @@
 All notable changes to this project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/).
 In order to read more about upgrading and BC breaks have a look at the [UPGRADE Document](UPGRADE.md).
 
-## 2.2.1
+## 2.2.1 (5. October 2022)
 
 + [#2159](https://github.com/luyadev/luya/pull/2159) Added missing option to create menu items with a scheme instead of relative paths.
 + [#2152](https://github.com/luyadev/luya/issues/2152) Fix issue when creating a LUYA theme on Windows.