Fix settings for k8s-infra-ci-robot
Fix settings for k8s-infra-ci-robot

Allow k8s-infra-ci-robot@kubernetes.io to receive messages from
the outside.

Signed-off-by: Arnaud Meukam <96190fcd0798f0afa72279990e31ddc33e4f2ea2@gmail.com>

kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io