[AIRFLOW-6545] Add commit message validation (#7149)

.github/boring-cyborg.yml

@@ -182,3 +182,7 @@ insertIssueLinkInPrDescription:
     docOnlyIssueMatch:
       titleIssueIdRegexp: \[(AIRFLOW-X{4})\]
       descriptionIssueLink: "`Document only change, no JIRA issue`"
+
+verifyTitles:
+  titleRegexp: ^\[AIRFLOW-[0-9]{4}\].*$|^\[AIRFLOW-XXXX\].*$
+  validateEitherPrOrSingleCommitTitle: true