Update net-kourier nightly (#11762)
Update net-kourier nightly (#11762)

bumping knative.dev/net-kourier 6cb8dfe...d349dca:
  > d349dca Reuse e2e-kind script in Github Action (# 586)
  > 2b3efce Remove unused script to setup kind cluster (# 587)
  > 0336235 upgrade to latest dependencies (# 588)

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