Merge branch 'zj-accept-default-branch-param' into 'master'

Accept default branch param on notifaction services

Closes #31173

See merge request !10959

app/controllers/concerns/service_params.rb

@@ -38,6 +38,7 @@ module ServiceParams
     :new_issue_url,
     :notify,
     :notify_only_broken_pipelines,
+    :notify_only_default_branch,
     :password,
     :priority,
     :project_key,

changelogs/unreleased/zj-accept-default-branch-param.yml

+---
+title: Ensure the chat notifications service properly saves the "Notify only default branch" setting
+merge_request: 10959
+author: