[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 ed52a38...215ce06:
  > 215ce06 Update community files (# 784)

[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.53%. Comparing base (64b8325) to head (58a6685).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15603   +/-   ##
=======================================
  Coverage   83.53%   83.53%           
=======================================
  Files         219      219           
  Lines       17427    17427           
=======================================
  Hits        14558    14558           
- Misses       2497     2498    +1     
+ Partials      372      371    -1     

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