Merge branch 'patch-19' into 'master'

fix docs link

See merge request gitlab-org/gitlab-ce!17195

doc/administration/monitoring/index.md

@@ -5,5 +5,5 @@ Explore our features to monitor your GitLab instance:
 - [Performance monitoring](performance/index.md): GitLab Performance Monitoring makes it possible to measure a wide variety of statistics of your instance.
 - [Prometheus](prometheus/index.md): Prometheus is a powerful time-series monitoring service, providing a flexible platform for monitoring GitLab and other software products.
 - [GitHub imports](github_imports.md): Monitor the health and progress of GitLab's GitHub importer with various Prometheus metrics.
-- [Monitoring uptime](../user/admin_area/monitoring/health_check.md): Check the server status using the health check endpoint.
+- [Monitoring uptime](../../user/admin_area/monitoring/health_check.md): Check the server status using the health check endpoint.
   - [IP whitelists](ip_whitelist.md): Configure GitLab for monitoring endpoints that provide health check information when probed.