Merge pull request #8346 from strongjz/ingate-slack

add ingate channels

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -186,6 +186,8 @@ channels:
   - name: in-dev
   - name: in-events
   - name: in-users
+  - name: ingate-dev
+  - name: ingate-users
   - name: ingress-nginx-dev
   - name: ingress-nginx-users
     id: CANQGM8BA