Merge pull request #6937 from cgwalters/add-kube-os-coordination

channels: Add kube-operating-systems-dev

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -224,6 +224,7 @@ channels:
     archived: true
   - name: kube-monkey
   - name: kube-oidc-proxy
+  - name: kube-operating-systems-dev
   - name: kube-router
   - name: kube-score
   - name: kube-spawn