[Automated] Update net-kourier nightly

[knative-automation]

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

Produced via:

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

Details:

bumping knative.dev/net-kourier d2e2992...87b6868:
  > 87b6868 Update community files (# 1421)

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.26%. Comparing base (5e94a30) to head (c9aef3f).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16380      +/-   ##
==========================================
+ Coverage   80.24%   80.26%   +0.02%     
==========================================
  Files         216      216              
  Lines       13483    13483              
==========================================
+ Hits        10819    10822       +3     
+ Misses       2297     2295       -2     
+ Partials      367      366       -1     

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[dprotaso]

/retest