Fix 404 for usage question mark link

ee/app/views/groups/usage_quotas/index.html.haml

@@ -20,5 +20,5 @@
     = render "namespaces/pipelines_quota/list",
       locals: { namespace: @group, projects: @projects }
   .tab-pane#storage-quota-tab
-    #js-storage-counter-app{ data: { namespace_path: @group.full_path, help_page_path: help_page_path('user/group', anchor: 'storage-usage-quota-starter')} }
+    #js-storage-counter-app{ data: { namespace_path: @group.full_path, help_page_path: help_page_path('user/group/index.md', anchor: 'storage-usage-quota-starter')} }