[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 0157f08...68ad8ba:
  > 68ad8ba Update community files (# 1238)
  > 9960e27 Increase gateway memory limit (# 1236)
  > 88ca5fe upgrade to latest dependencies (# 1237)

[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 84.97%. Comparing base (c2d0af1) to head (4fde24f).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15097      +/-   ##
==========================================
+ Coverage   84.11%   84.97%   +0.85%     
==========================================
  Files         213      213              
  Lines       16783    13102    -3681     
==========================================
- Hits        14117    11133    -2984     
+ Misses       2315     1616     -699     
- Partials      351      353       +2     

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[ReToCode]

/test kourier-stable