Merge pull request #6812 from detiber/OBSPoC

slack-config/sig-release: Add release-packages-poc channel

Author: k8s-ci-robot

communication/slack-config/sig-release/config.yaml

@@ -8,3 +8,4 @@ channels:
   - name: release-management
     id: CJH2GBF7Y
   - name: release-notes
+  - name: release-packages-poc