[Automated] Update net-istio nightly

[knative-automation]

/assign @knative/serving-writers
/cc @knative/serving-writers

Produced via:

for x in net-istio.yaml; do
  curl https://storage.googleapis.com/knative-nightly/net-istio/latest/$x > ${GITHUB_WORKSPACE}/./third_party/istio-latest/$x
done

Details:

bumping knative.dev/net-istio acf343f...ae9f4ff:
  > ae9f4ff Drop PeerAuthentication for domainmapping-webhook (# 1141)

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.04 🎉

Comparison is base (a7613e4) 86.20% compared to head (c877f84) 86.25%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14173      +/-   ##
==========================================
+ Coverage   86.20%   86.25%   +0.04%     
==========================================
  Files         199      199              
  Lines       14811    14811              
==========================================
+ Hits        12768    12775       +7     
+ Misses       1739     1734       -5     
+ Partials      304      302       -2     

see 2 files with indirect coverage changes

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[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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