Update net-istio nightly (#12591)
Update net-istio nightly (#12591)

bumping knative.dev/net-istio 7a6405e...5034633:
  > 5034633 Update actions (# 859)
  > 5284c66 upgrade to latest dependencies (# 860)
  > d74c0c9 Update community files (# 855)
  > 059bbb5 upgrade to latest dependencies (# 858)
  > 78ab380 Update actions (# 856)

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