Add kubernetes-hybrid-cloud slack channel

Author: Atoms

communication/slack-config/channels.yaml

@@ -295,6 +295,7 @@ channels:
     archived: true
   - name: kubernetes-careers
   - name: kubernetes-client
+  - name: kubernetes-hybrid-cloud
   - name: kubernetes-new-contributors
     id: C09R23FHP
   # kubernetes-docs-* channels are defined in sig-docs/