Update CHANGELOG.md for 9.2.9

[ci skip]

CHANGELOG.md

@@ -274,6 +274,10 @@ entry.
 - Remove foreigh key on ci_trigger_schedules only if it exists.
 - Allow translation of Pipeline Schedules.
+## 9.2.9 (2017-07-20)
+
+- Fix an infinite loop when handling user-supplied regular expressions.
+
 ## 9.2.8 (2017-07-19)
 - Improve support for external issue references. !12485