Fix broken link to documentation

Link to a more appropriate section

app/views/clusters/clusters/show.html.haml

@@ -29,7 +29,7 @@
   pre_installed_knative: @cluster.knative_pre_installed? ? 'true': 'false',
   help_path: help_page_path('user/project/clusters/index.md', anchor: 'installing-applications'),
   ingress_help_path: help_page_path('user/project/clusters/index.md', anchor: 'getting-the-external-endpoint'),
-  ingress_dns_help_path: help_page_path('user/project/clusters/index.md', anchor: 'manually-determining-the-external-endpoint'),
+  ingress_dns_help_path: help_page_path('user/clusters/applications.md', anchor: 'pointing-your-dns-at-the-external-endpoint'),
   ingress_mod_security_help_path: help_page_path('user/clusters/applications.md', anchor: 'web-application-firewall-modsecurity'),
   environments_help_path: help_page_path('ci/environments', anchor: 'defining-environments'),
   clusters_help_path: help_page_path('user/project/clusters/index.md', anchor: 'deploying-to-a-kubernetes-cluster'),

changelogs/unreleased/38297-knative-domain-name-endpoint-section-links-to-invalid-doc.yml

+---
+title: Fix broken link to documentation
+merge_request: 23715
+author:
+type: fixed