Merge pull request #4779 from atoato88/add-jp-contribex-channel

Add slack #jp-mentoring channel

Author: k8s-ci-robot

communication/slack-config/channels.yaml

@@ -114,6 +114,7 @@ channels:
   - name: jenkins-x-user
   - name: jp-dev
   - name: jp-events
+  - name: jp-mentoring
   - name: jp-users
   - name: jp-users-novice
   - name: jsonnet