Merge pull request #527 from nextcloud/rakekniven-changelog

Update CHANGELOG.md

CHANGELOG.md

@@ -5,7 +5,13 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-### [2.20.4] - 2018-xx-xx
+### [2.20.6] - 2018-xx-xx
+- See https://github.com/nextcloud/ios/milestone/28
+
+## [2.20.5] - 2018-03-08
+- See https://github.com/nextcloud/ios/milestone/27
+
+## [2.20.4] - 2018-03-05
 - See https://github.com/nextcloud/ios/milestone/26
 
 ## [2.20.3] - 2018-02-22