Merge pull request #7945 from jriedel-ionos/cluster-api-ionoscloud

Add cluster-api-ionoscloud Slack channel

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -71,6 +71,7 @@ channels:
     archived: true
   - name: cluster-api-gcp
   - name: cluster-api-ibmcloud
+  - name: cluster-api-ionoscloud
   - name: cluster-api-k3s
   - name: cluster-api-kubemark
   - name: cluster-api-kubevirt