[Automated] Update net-contour nightly

[knative-automation]

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

Produced via:

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

Details:

bumping knative.dev/net-contour 49217c7...30198bc:
  > 30198bc upgrade to latest dependencies (# 1239)
  > c287a72 bump k8s testing in kind (# 1237)

[knative-prow]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.14%. Comparing base (9786b60) to head (ce84a2e).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #16351      +/-   ##
==========================================
- Coverage   80.16%   80.14%   -0.03%     
==========================================
  Files         216      216              
  Lines       13435    13435              
==========================================
- Hits        10770    10767       -3     
- Misses       2298     2300       +2     
- Partials      367      368       +1     

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