Add CHANGELOG.md entry

CHANGELOG.md

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 ## 8.14.0 (2016-11-22)
   - Adds user project membership expired event to clarify why user was removed (Callum Dryden)
+  - Fix HipChat notifications rendering (airatshigapov, eisnerd)
   - Simpler arguments passed to named_route on toggle_award_url helper method
 ## 8.13.0 (2016-10-22)