Merge pull request #6395 from aramase/sig-auth-kms-dev-slack

add sig-auth-kms-dev slack channel

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -357,6 +357,7 @@ channels:
   - name: sig-api-machinery-cel-dev
   - name: sig-apps
   - name: sig-auth
+  - name: sig-auth-kms-dev
   - name: sig-autoscaling
   - name: sig-autoscaling-api
   - name: sig-cli