Update net-istio nightly (#12157)
Update net-istio nightly (#12157)

bumping knative.dev/net-istio ab24091...afb0a63:
  > afb0a63 Update actions (# 785)
  > a11aca3 upgrade to latest dependencies (# 786)
  > f067993 fix go1.17 related issues (# 787)

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