docs: update change log

Author: wangyoucao577

CHANGELOG.md

@@ -18,6 +18,7 @@
       - FIXED: treat `bicycle=use_sidepath` as no access on the tagged way. [#5622](https://github.com/Project-OSRM/osrm-backend/pull/5622)
     - Misc:
       - CHANGED: Reduce memory usage for raster source handling. [#5572](https://github.com/Project-OSRM/osrm-backend/pull/5572)
+      - CHANGED: Remove compile time debug log control. [#3427](https://github.com/Project-OSRM/osrm-backend/issues/3427)
 
 # 5.21.0
   - Changes from 5.20.0