Update CHANGELOG

Author: MKodde

CHANGELOG.md

@@ -5,6 +5,21 @@ We will continue to post relevant release notes on the GitHub release page. More
 
 More information about our release strategy can be found in the [Development Guidelines](https://github.com/OpenConext/OpenConext-engineblock/wiki/Development-Guidelines#release-notes) on the EngineBlock wiki.
 
+## 6.12.00
+**Feature**
+* Inject the logger on StepupDecision #1254
+
+**Bugfix**
+* Improve MDUI Logo usage #1264
+
+**Improvement**
+* Documentation regarding the `metadata:coin:stepup:forceauthn` feature was added. 
+* Specify data types of roles columns #1262
+
+**Maintenance**
+* Test integration Github Action utilizes base container
+* Test integration runs against PHP 7.2 and PHP 8.2 (removed PHP 5.6 test runs) 
+
 ## 6.11.0
 **Feature**
 * Allow to set EB's metadata XML Organization fields via translation (overrides).