Update net-kourier nightly (#12515)
Update net-kourier nightly (#12515)

bumping knative.dev/net-kourier 99c7171...37d3663:
  > 37d3663 Update actions (# 752)

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