Merge branch 'docs-aqualls-comma-fix' into 'master'

Docs: improve wording for metric dashboard public visibility setting

See merge request gitlab-org/gitlab!31115

doc/user/project/integrations/prometheus.md

@@ -937,7 +937,7 @@ Prerequisites for embedding from a Grafana instance:
 
 You can set the visibility of the metrics dashboard to **Only Project Members**
 or **Everyone With Access**. When set to **Everyone with Access**, the metrics
-dashboard, and all of the custom dashboard, YAML files, are visible to authenticated and non-authenticated users.
+dashboard is visible to authenticated and non-authenticated users.
 
 ## Troubleshooting