build: sync common files from github_organization_management repository

Author: metworkbot

.mergify.yml

@@ -112,10 +112,9 @@ pull_request_rules:
     actions:
       merge:
         method: squash
-        commit_message_template: |-
-          {{ title }} (#{{ number }})
-
-          {{ body }}
+        commit_message_format:
+          title: pr-title
+          body: pr-body
     conditions:
 
       - base!=master