Fix link to base domain help in clusters view

The link led to a help which does not cover
"Pointing your DNS at the external endpoint".

app/views/clusters/clusters/_form.html.haml

@@ -31,7 +31,7 @@
         = s_('ClusterIntegration|Alternatively')
         %code{ :class => "js-ingress-domain-snippet" } #{@cluster.application_ingress_external_ip}.nip.io
         = s_('ClusterIntegration| can be used instead of a custom domain.')
-      - custom_domain_url = help_page_path('user/project/clusters/index', anchor: 'pointing-your-dns-at-the-external-endpoint')
+      - custom_domain_url = help_page_path('user/clusters/applications.md', anchor: 'pointing-your-dns-at-the-external-endpoint')
       - custom_domain_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: custom_domain_url }
       = s_('ClusterIntegration| %{custom_domain_start}More information%{custom_domain_end}.').html_safe % { custom_domain_start: custom_domain_start, custom_domain_end: '</a>'.html_safe }
 

changelogs/unreleased/pl-fix-base-domain-link.yml

+---
+title: Fix link to base domain help in clusters view
+merge_request: 24658
+author:
+type: fixed