Update net-kourier nightly (#12520)
Update net-kourier nightly (#12520)

bumping knative.dev/net-kourier 37d3663...f3ceea7:
  > f3ceea7 Fix leader election issues due to defaults change (# 753)

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