Update go dependencies

vendor/k8s.io/kubernetes/SUPPORT.md

@@ -18,22 +18,12 @@ The Kubernetes Community is active on Stack Overflow, you can post your question
 * [User Documentation](https://kubernetes.io/docs/) 
 * [Troubleshooting Guide](https://kubernetes.io/docs/tasks/debug-application-cluster/troubleshooting/)
 
-
 ### Real-time Chat
 
 * [Slack](https://kubernetes.slack.com) ([registration](http://slack.k8s.io)):
 The `#kubernetes-users` and `#kubernetes-novice` channels are usual places where 
 people offer support.
 
-* Also check out the 
-[Slack Archive](http://kubernetes.slackarchive.io/) of past conversations.
+### Forum
 
-### Mailing Lists/Groups
-
-* [Kubernetes-users group](https://groups.google.com/forum/#!forum/kubernetes-users)
-
-
-
-<!---
-Derived from https://github.com/kubernetes/community/blob/master/contributors/devel/on-call-user-support.md
---> 
+* [Kubernetes Official Forum](https://discuss.kubernetes.io)