Update CHANGELOG

CHANGELOG.md

@@ -5,6 +5,17 @@ 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.
 
+## 6.15.0
+
+New features:
+* Authentication logging additions
+* Support and follow `release_as` and `use_as_nameid` when configured in ARP
+    *  Overwrite the NameID when specified in use_as_nameid ARP setting #1308
+    *  Create Corto input filter for the ARP directive release_as to be applied #1307
+
+Bugfix:
+*  Ensure HTTP exception is thrown when API fails #1310
+
 ## 6.14.0
 * Support overriding StepUp EntityId #1279
 * Check for needed parameters before constructing an auth failed response. #1289