[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 6d1435a...e75d717:
  > e75d717 Update community files (# 766)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.49%. Comparing base (3c5f2f6) to head (97df95b). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #15502 +/- ## ========================================== + Coverage 84.45% 84.49% +0.03% ========================================== Files 219 219 Lines 13608 13608 ========================================== + Hits 11493 11498 +5 + Misses 1742 1740 -2 + Partials 373 370 -3 ```

:umbrella: View full report in Codecov by Sentry.
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[skonto]

/lgtm /approve

[knative-prow[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

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

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/knative/serving/blob/main/OWNERS)~~ [skonto] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment