Merge pull request #6659 from maxgio92/slack/add-capsule-channel

slack config: add Capsule channel

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -27,6 +27,7 @@ channels:
     archived: true
   - name: brigade
   - name: camptocamp-devops-stack
+  - name: capsule
   - name: cartographer
   - name: cdk
   - name: cert-manager