renamed google group for SIG Node

Author: SergeyKanzhelev

.github/ISSUE_TEMPLATE/support.md

@@ -11,7 +11,7 @@ STOP -- PLEASE READ!
 GitHub is not the right place for support requests.
 
 If you're looking for help, check the [troubleshooting guide](https://kubernetes.io/docs/tasks/debug-application-cluster/troubleshooting/)
-or our [Mailing list](https://groups.google.com/forum/#!forum/kubernetes-sig-node)
+or our [Mailing list](https://groups.google.com/a/kubernetes.io/g/sig-node)
 
 You can also post your question on the [Slack channel](https://kubernetes.slack.com/messages/node-feature-discovery)
 

docs/contributing/index.md

@@ -14,7 +14,7 @@ You can reach us via the following channels:
 
 - [#node-feature-discovery](https://kubernetes.slack.com/messages/node-feature-discovery)
   channel in [Kubernetes Slack](https://slack.k8s.io/)
-- [SIG-Node](https://groups.google.com/g/kubernetes-sig-node) mailing list
+- [SIG-Node](https://groups.google.com/a/kubernetes.io/g/sig-node) mailing list
 - File an
   [issue](https://github.com/kubernetes-sigs/node-feature-discovery/issues/new)
   in this repository