[Automated] Update net-gateway-api nightly

[knative-automation]

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

Produced via:

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

Details:

bumping knative.dev/net-gateway-api 88bcb2d...b43b985:
  > b43b985 upgrade to latest dependencies (# 787)

[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 83.54%. Comparing base (bd9050e) to head (cf55577).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15620   +/-   ##
=======================================
  Coverage   83.54%   83.54%           
=======================================
  Files         219      219           
  Lines       17427    17427           
=======================================
  Hits        14559    14559           
- Misses       2497     2498    +1     
+ Partials      371      370    -1     

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• Flaky Tests Detection - Detect and resolve failed and flaky tests

[ReToCode]

/test gateway-api-latest

[ReToCode]

/test gateway-api-latest