Merge pull request #4058 from ameukam/prow-on-call-cpanato

Add cpanato to the prow oncall team.

Author: k8s-ci-robot

groups/sig-testing/groups.yaml

@@ -220,6 +220,7 @@ groups:
     # sig-k8s-infra members
     - ameukam@gmail.com
     - cblecker@gmail.com
+    - ctadeu@gmail.com
     - davanum@gmail.com
     - eddiezane@gmail.com
     - thockin@google.com