Update gitlab.yml.example to match the default settings for Geo sync workers

changelogs/unreleased-ee/fix-config-yml-example-cronjob-timings.yml

+---
+title: Update gitlab.yml.example to match the default settings for Geo sync workers
+merge_request: 3488
+author:
+type: fixed

config/gitlab.yml.example

@@ -254,12 +254,12 @@ production: &base
     # GitLab Geo repository sync worker
     # NOTE: This will only take effect if Geo is enabled (secondary nodes only)
     geo_repository_sync_worker:
-      cron: "*/5 * * * *"
+      cron: "*/1 * * * *"
 
     # GitLab Geo file download dispatch worker
     # NOTE: This will only take effect if Geo is enabled (secondary nodes only)
     geo_file_download_dispatch_worker:
-      cron: "*/10 * * * *"
+      cron: "*/1 * * * *"
 
   registry:
     # enabled: true