Updated CHANGELOG

Author: tgeens

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## 0.4.0 - 2022-10-04
 
 Changed:
+* [#8] - Moved packages to `com.contentgrid.opa`
 * [#7] - Moved maven group coordinates to `com.contentgrid.opa-java-client`
 
 Housekeeping: