Add cron job to gitlab.yml/example

config/gitlab.yml.example

@@ -607,6 +607,10 @@ production: &base
     elastic_index_initial_bulk_cron_worker:
       cron: "*/10 * * * *"
 
+    # Periodically prune stale runners from namespaces having opted-in.
+    ci_runners_stale_group_runners_prune_cron_worker:
+      cron: "0 2 * * *"
+
   registry:
     # enabled: true
     # host: registry.example.com

config/initializers/1_settings.rb

@@ -772,9 +772,9 @@
   Settings.cron_jobs['arkose_blocked_users_report_worker'] ||= Settingslogic.new({})
   Settings.cron_jobs['arkose_blocked_users_report_worker']['cron'] ||= '0 6 * * *'
   Settings.cron_jobs['arkose_blocked_users_report_worker']['job_class'] = 'Arkose::BlockedUsersReportWorker'
-  Settings.cron_jobs['ci_runners_stale_group_runners_prune_worker'] ||= Settingslogic.new({})
-  Settings.cron_jobs['ci_runners_stale_group_runners_prune_worker']['cron'] ||= '0 2 * * *'
-  Settings.cron_jobs['ci_runners_stale_group_runners_prune_worker']['job_class'] = 'Ci::Runners::StaleGroupRunnersPruneCronWorker'
+  Settings.cron_jobs['ci_runners_stale_group_runners_prune_cron_worker'] ||= Settingslogic.new({})
+  Settings.cron_jobs['ci_runners_stale_group_runners_prune_cron_worker']['cron'] ||= '0 2 * * *'
+  Settings.cron_jobs['ci_runners_stale_group_runners_prune_cron_worker']['job_class'] = 'Ci::Runners::StaleGroupRunnersPruneCronWorker'
 end
 
 #