Merge pull request #8143 from a-hilaly/kro

Add project `kro` to slack channels

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -249,6 +249,7 @@ channels:
   - name: kraken
   - name: krane
   - name: krator
+  - name: kro
   - name: krew
   - name: krex
   - name: krustlet