Merge pull request #5357 from mikeshng/open-cluster-management

New slack channel for open-cluster-management

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -278,6 +278,7 @@ channels:
   - name: office-hours
   - name: okteto
   - name: olm-dev
+  - name: open-cluster-mgmt
   - name: opencontainers
   - name: openebs
   - name: openebs-dev