Update net-contour nightly (#12628)
Update net-contour nightly (#12628)

bumping knative.dev/net-contour aa1a8a4...69648de:
  > 69648de upgrade to latest dependencies (# 724)

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