Update CHANGELOG.md

CHANGELOG.md

@@ -6,9 +6,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-### [2.22.7] - 2018-xx-xx
+## [2.22.7] - 2018-12-17
+- See https://github.com/nextcloud/ios/milestone/42
 
-### [2.22.6] - 2018-11-xx
+## [2.22.6] - 2018-11-25
 - See https://github.com/nextcloud/ios/milestone/41
 - View and actions of trash bin