Added CHANGELOG.md entry for #2983 issue fix

Author: whytro

CHANGELOG.md

@@ -1,5 +1,7 @@
 # Unreleased
   - Changes from 5.27.1
+    - API:
+      - CHANGED: Require a `radius` parameter when using `bearings`. [#6572](https://github.com/Project-OSRM/osrm-backend/pull/6572)
     - Build:
       - ADDED: Add CI job which builds OSRM with gcc 12. [#6455](https://github.com/Project-OSRM/osrm-backend/pull/6455)
       - CHANGED: Upgrade to clang-tidy 15. [#6439](https://github.com/Project-OSRM/osrm-backend/pull/6439)