Change Task titles to imperative: Federation. (#4031)

_data/tasks.yml

@@ -129,7 +129,7 @@ toc:
   - title: Changing Cluster Size
     path: https://github.com/kubernetes/kubernetes/wiki/User-FAQ#how-do-i-change-the-size-of-my-cluster/
 
-- title: Federation - Running an App on Multiple Clusters
+- title: Federation - Run an App on Multiple Clusters
   section:
   - docs/tasks/federation/federation-service-discovery.md
   - docs/tasks/federation/set-up-cluster-federation-kubefed.md

docs/tasks/federation/set-up-cluster-federation-kubefed.md

@@ -1,7 +1,7 @@
 ---
 assignees:
 - madhusudancs
-title: Setting up Cluster Federation with Kubefed
+title: Set up Cluster Federation with Kubefed
 redirect_from:
 - "/docs/admin/federation/kubefed/"
 - "/docs/admin/federation/kubefed.html"

docs/tasks/federation/set-up-coredns-provider-federation.md

@@ -1,5 +1,5 @@
 ---
-title: Setting up CoreDNS as DNS provider for Cluster Federation
+title: Set up CoreDNS as DNS provider for Cluster Federation
 redirect_from:
 - "/docs/tutorials/federation/set-up-coredns-provider-federation/"
 - "/docs/tutorials/federation/set-up-coredns-provider-federation.html"