Merge pull request #7426 from dims/sig-node-mothball-old-scrub-slack-channel-and-create-one-for-sig-node-ci

[sig-node] mothball old scrub slack channel and create a fresh one for CI subgroup

Author: k8s-ci-robot

communication/slack-config/sig-node/config.yaml

@@ -1,6 +1,8 @@
 channels:
   - name: sig-node
   - name: sig-node-bug-scrub
+    archived: true
+  - name: sig-node-ci
   - name: sig-node-kmm
     id: C037RE58RED
   - name: sig-node-rkt