Add missing Geo check command to rake task docs

doc/administration/raketasks/geo.md

@@ -7,6 +7,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 # Geo Rake Tasks **(PREMIUM SELF)**
 
 The following Rake tasks are for [Geo installations](../geo/index.md).
+See also [troubleshooting Geo](../geo/replication/troubleshooting.md) for additional Geo Rake tasks.
 
 ## Git housekeeping
 

doc/administration/raketasks/maintenance.md

@@ -111,6 +111,7 @@ The `gitlab:check` Rake task runs the following Rake tasks:
 It checks that each component was set up according to the installation guide and suggest fixes
 for issues found. This command must be run from your application server and doesn't work correctly on
 component servers like [Gitaly](../gitaly/configure_gitaly.md#run-gitaly-on-its-own-server).
+If you're running Geo, see also the [Geo Health check Rake task](../geo/replication/troubleshooting.md#health-check-rake-task).
 
 You may also have a look at our troubleshooting guides for: