Update link to k8s-status to use toolforge.org domain

Summary:
*.toolforge.org is current canonical Toolforge tool domain.
Change the link to k8s-status to use it -- the tool itself
appears to work fine.

This is to avoid an unnecessary redirect.

Test Plan:
	Verify the "Kubernetes cluster status" link
	at admin.toolforge.org points to k8s-status.toolforge.org,
	not tools.wmflabs.org/k8s-status.

Reviewers: bd808, Majavah

Tags: #tool-admin, #user-urbanecm

Differential Revision: https://phabricator.wikimedia.org/D1197

Author: urbanecm

data/templates/base.html

@@ -43,7 +43,7 @@
               <a class="dropdown-item" href="https://replag.toolforge.org/">Wiki Replica replication lag</a>
               <a class="dropdown-item" href="https://tool-db-usage.toolforge.org/">Usage of tool owned databases</a>
               <div class="dropdown-divider"></div>
-              <a class="dropdown-item" href="https://tools.wmflabs.org/k8s-status/">Kubernetes cluster status</a>
+              <a class="dropdown-item" href="https://k8s-status.toolforge.org/">Kubernetes cluster status</a>
               <a class="dropdown-item" href="https://docker-registry.toolforge.org/">Docker registry</a>
               <div class="dropdown-divider"></div>
               <a class="dropdown-item" href="https://sge-jobs.toolforge.org/">Grid engine jobs history</a>