Merge pull request #7672 from cmwylie19/pepr

chore: add pepr channel

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -397,6 +397,7 @@ channels:
   - name: outreachy-apps
     id: CDH610735
   - name: paralus
+  - name: pepr
   - name: pharmer
   - name: pinniped
   - name: pl-users