Update net-kourier nightly (#13223)
Update net-kourier nightly (#13223)

bumping knative.dev/net-kourier 740aef7...2491af6:
  > 2491af6 upgrade to latest dependencies (# 896)

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

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