Fix: Changelog format update

Author: marceljk

CHANGELOG.md

@@ -1,6 +1,7 @@
 ## Release (2025-XX-XX)
 
-- **Bugfix:** `ConfigureRegion` does not return an error if a region is set by an enviroment variable.
+- `core`: [v0.15.1](core/CHANGELOG.md#v0151-2025-01-08)
+  - **Bugfix:** `ConfigureRegion` does not return an error if a region is set by an enviroment variable.
 
 ## Release (2025-01-07)