Merge pull request #3698 from dholbach/update-cluster-addons-links

update links to cluster addons slack

Author: k8s-ci-robot

sig-cluster-lifecycle/README.md

@@ -67,6 +67,8 @@ The following subprojects are owned by sig-cluster-lifecycle:
 - **cluster-addons**
   - Owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/addon-operators/master/OWNERS
+  - Contact
+    - Slack: [#cluster-addons](https://kubernetes.slack.com/messages/cluster-addons)
 - **cluster-api**
   - Owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api/master/OWNERS

sigs.yaml

@@ -912,6 +912,8 @@ sigs:
     owners:
     - https://raw.githubusercontent.com/kubernetes-incubator/bootkube/master/OWNERS
   - name: cluster-addons
+    contact:
+      slack: cluster-addons
     owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/addon-operators/master/OWNERS
   - name: cluster-api