[Automated] Update net-istio nightly

[knative-automation]

/assign @knative/networking-wg-leads
/cc @knative/networking-wg-leads

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 ff4bc83...a7d1b61:
  > a7d1b61 Update community files (# 1038)

[codecov]

Codecov Report

Base: 86.41% // Head: 86.46% // Increases project coverage by +0.05% 🎉

Coverage data is based on head (99ef650) compared to base (38fa7c0).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13549      +/-   ##
==========================================
+ Coverage   86.41%   86.46%   +0.05%     
==========================================
  Files         196      196              
  Lines       14600    14600              
==========================================
+ Hits        12616    12624       +8     
+ Misses       1681     1676       -5     
+ Partials      303      300       -3     

Impacted Files	Coverage Δ
pkg/reconciler/configuration/configuration.go	84.36% <0.00%> (+1.42%)	⬆️
pkg/autoscaler/statserver/server.go	77.37% <0.00%> (+3.64%)	⬆️

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[psschwei]

/lgtm
/approve
/retest

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: knative-automation, psschwei

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