update CHANGELOG.md

CHANGELOG.md

@@ -5,9 +5,15 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.6.0 - 2020-10-19
+
+### Fixed
+
+- the previously added functionality broke on an update of the viewer application
+
 ## 0.5.0 - 2020-10-12
 
-#### Added
+### Added
 
 - include a static CSS resource to the viewer for project specific styling (mainly the text area)