Update net-contour nightly (#13194)
Update net-contour nightly (#13194)

bumping knative.dev/net-contour d74c247...d7a54ac:
  > d7a54ac Update community files (# 798)

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