Merge branch 'doc-update-dashboard-url' into 'master'

Update doc: url reference to grafana

See merge request gitlab-org/gitlab-ce!21637

doc/development/performance.md

@@ -43,7 +43,7 @@ GitLab provides built-in tools to aid the process of improving performance:
 * [QueryRecoder](query_recorder.md) for preventing `N+1` regressions
 
 GitLab employees can use GitLab.com's performance monitoring systems located at
-<http://performance.gitlab.net>, this requires you to log in using your
+<https://dashboards.gitlab.net>, this requires you to log in using your
 `@gitlab.com` Email address. Non-GitLab employees are advised to set up their
 own InfluxDB + Grafana stack.
 

doc/user/gitlab_com/index.md

@@ -99,7 +99,7 @@ Below are the shared Runners settings.
 | Default Docker image                  | `ruby:2.5`                                        | -          |
 | `privileged` (run [Docker in Docker]) | `true`                                            | `false`    |
 
-[ci_version_dashboard]: https://monitor.gitlab.net/dashboard/db/ci?from=now-1h&to=now&refresh=5m&orgId=1&panelId=12&fullscreen&theme=light
+[ci_version_dashboard]: https://dashboards.gitlab.com/dashboard/db/ci?from=now-1h&to=now&refresh=5m&orgId=1&panelId=12&fullscreen&theme=light
 
 ### `config.toml`