Update ruby metrics endpoint text to be clearer

app/views/admin/application_settings/_form.html.haml

@@ -313,8 +313,9 @@
   %fieldset
     %legend Metrics - Prometheus
     %p
-      Setup Prometheus to measure a variety of statistics that partially overlap and complement Influx based metrics.
-      This setting requires a
+      Enable a Prometheus metrics endpoint at `#{metrics_path}` to expose a variety of statistics on the health and performance of GitLab. Additional information on authenticating and connecting to the metrics endpoint is available
+      = link_to 'here', admin_health_check_path
+      \. This setting requires a
       = link_to 'restart', help_page_path('administration/restart_gitlab')
       to take effect.
       = link_to icon('question-circle'), help_page_path('administration/monitoring/performance/introduction')