[Release 1.34] Bump Traefik to v3.6.9

[manuelbuil]

Backport: #13693
Issue: #13697

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.77%. Comparing base (4f1fc1b) to head (e227c86).
⚠️ Report is 1 commits behind head on release-1.34.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.34   #13702      +/-   ##
================================================
- Coverage         21.78%   21.77%   -0.02%     
================================================
  Files               191      191              
  Lines             15539    15539              
================================================
- Hits               3385     3383       -2     
- Misses            11703    11705       +2     
  Partials            451      451              

Flag	Coverage Δ
unittests	21.77% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.