Update net-kourier nightly (#13196)
Update net-kourier nightly (#13196)

bumping knative.dev/net-kourier 3ad4504...fe85c71:
  > fe85c71 Update community files (# 891)

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