fix: updated changelog entry

Signed-off-by: aceppaluni <[email protected]>

Author: aceppaluni

CHANGELOG.md

@@ -10,6 +10,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 
 ### Added
 
+- Added unit tests for `key_format.py` to improve coverage.
 - Fix inactivity bot execution for local dry-run testing.
 - Added documentation: "Testing GitHub Actions using Forks" (`docs/sdk_developers/training/testing_forks.md`).
 - Unified the inactivity-unassign bot into a single script with `DRY_RUN` support, and fixed handling of cross-repo PR references for stale detection.