Update net-kourier nightly (#13297)
Update net-kourier nightly (#13297)

bumping knative.dev/net-kourier 4a13673...bef6ad3:
  > bef6ad3 upgrade to latest dependencies (# 914)
  > d245d41 upgrade to latest dependencies (# 912)

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

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