Merge pull request #4980 from zacharysarah/add-persian-channel

Add a channel for Persian docs

Author: k8s-ci-robot

communication/slack-config/sig-docs/docs-channels.yaml

@@ -2,6 +2,7 @@ channels:
   - name: kubernetes-docs-ar
   - name: kubernetes-docs-de
   - name: kubernetes-docs-es
+  - name: kubernetes-docs-fa
   - name: kubernetes-docs-fr
   - name: kubernetes-docs-hi
   - name: kubernetes-docs-id