Fix old monitoring links to point to the new location

doc/development/performance.md

@@ -37,7 +37,7 @@ graphs/dashboards.
 GitLab provides built-in tools to aid the process of improving performance:
 * [Sherlock](profiling.md#sherlock)
-* [GitLab Performance Monitoring](../monitoring/performance/monitoring.md)
+* [GitLab Performance Monitoring](../administration/monitoring/performance/monitoring.md)
 * [Request Profiling](../administration/monitoring/performance/request_profiling.md)
 GitLab employees can use GitLab.com's performance monitoring systems located at

doc/monitoring/performance/gitlab_configuration.md

-This document was moved to [administration/monitoring/performance/gitlab_configuration](../administration/monitoring/performance/gitlab_configuration.md).
+This document was moved to [administration/monitoring/performance/gitlab_configuration](../../administration/monitoring/performance/gitlab_configuration.md).

doc/monitoring/performance/influxdb_configuration.md

-This document was moved to [administration/monitoring/performance/influxdb_configuration](../administration/monitoring/performance/influxdb_configuration.md).
+This document was moved to [administration/monitoring/performance/influxdb_configuration](../../administration/monitoring/performance/influxdb_configuration.md).

doc/monitoring/performance/influxdb_schema.md

-This document was moved to [administration/monitoring/performance/influxdb_schema](../administration/monitoring/performance/influxdb_schema.md).
+This document was moved to [administration/monitoring/performance/influxdb_schema](../../administration/monitoring/performance/influxdb_schema.md).

doc/monitoring/performance/introduction.md

-This document was moved to [administration/monitoring/performance/introduction](../administration/monitoring/performance/introduction.md).
+This document was moved to [administration/monitoring/performance/introduction](../../administration/monitoring/performance/introduction.md).