[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 48a6a61...3b01e15:
  > 3b01e15 upgrade to latest dependencies (# 1502)
  > fbf354f bump k8s version and istio version to the latest patch (# 1500)

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.20%. Comparing base (f692621) to head (68bf173).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16354      +/-   ##
==========================================
+ Coverage   80.14%   80.20%   +0.05%     
==========================================
  Files         216      216              
  Lines       13440    13440              
==========================================
+ Hits        10772    10780       +8     
+ Misses       2302     2296       -6     
+ Partials      366      364       -2     

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[dprotaso]

/retest