Accept default branch param on notifaction services

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,

app/controllers/projects/settings/integrations_controller.rb

@@ -5,7 +5,7 @@ module Projects
 
       before_action :authorize_admin_project!
       layout "project_settings"
-      
+
       def show
         @hooks = @project.hooks
         @hook = ProjectHook.new

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: