Update net-kourier nightly (#12121)
Update net-kourier nightly (#12121)

bumping knative.dev/net-kourier 0d6985c...3d223e8:
  > 3d223e8 use latest version of knative serving and kourier (# 656)

Signed-off-by: Knative Automation <f415700d4d0ce1c81810fe7553e3eea2bed16231@knative.team>
knative/serving,knative/serving