Docs: Use the correct name for the feedback_links_enabled option (#61825)

Also updates the description to be more in line with the style conventions.

docs/sources/setup-grafana/configure-grafana/_index.md

@@ -550,9 +550,9 @@ Optionally, use this option to override the default endpoint address for Applica
 
 <hr />
 
-### enable_feedback_links
+### feedback_links_enabled
 
-If set to false will remove all feedback links from the UI. Defaults to true.
+Set to `false` to remove all feedback links from the UI. Default is `true`.
 
 ## [security]