Updated Changelog #711

Author: mgronover

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project are documented in this file.
 Format of the log is _loosely_ based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). 
 The project does _not_ follow Semantic Versioning and the changes are documented in reverse chronological order, grouped by calendar month.
 
+##October
+
+## Fixed with BREAKING CHANGE
+- *MessageDefiniton* uses *extensionPoint/IdentifierConfigurator/* that allows the user to decide to use german umlauts and paragraphs in it.
+- This extensionPoint got a new method. **Any old implementation not having this method will cause an error.**
+
 ## September 2023
 
 ### Fixed