Update net-kourier nightly (#12186)
Update net-kourier nightly (#12186)

bumping knative.dev/net-kourier fb94183...2d39cf9:
  > 2d39cf9 Update community files (# 677)
  > 8298b67 upgrade to latest dependencies (# 676)

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