Add docs link for shared pipeline runners

ee/app/views/namespaces/pipelines_quota/_extra_shared_runners_minutes_quota.html.haml

@@ -7,6 +7,7 @@
     %div
       = namespace_extra_shared_runner_limits_quota(namespace)
       minutes
+      = link_to icon('question-circle'), help_page_path('subscriptions/index', anchor: 'extra-shared-runners-pipeline-minutes'), target: '_blank', rel: 'noopener noreferrer'
   .col-sm-6.right
     #{namespace_extra_shared_runner_limits_percent_used(namespace)}% used
     = namespace_shared_runner_limits_progress_bar(namespace, extra: true)

ee/changelogs/unreleased/add-doc-link-shared-runner-minutes.yml

+---
+title: Add link to additional shared minutes from pipeline quote overview
+merge_request: 16389
+author:
+type: added