Update Traefik version to v3.6.7

[manuelbuil]

Proposed Changes

Upgrade Traefik to v3.6.7

Types of Changes

Version bump

Verification

Deploy K3s and verify that the new Traefik image has tag 3.6.7

Testing

Linked Issues

#13292

User-Facing Change

Bump Traefik to v3.6.7

Further Comments

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 21.48%. Comparing base (c24294f) to head (5c0e95d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13474   +/-   ##
=======================================
  Coverage   21.48%   21.48%           
=======================================
  Files         190      190           
  Lines       15479    15479           
=======================================
  Hits         3325     3325           
  Misses      11701    11701           
  Partials      453      453           

Flag	Coverage Δ
unittests	21.48% <ø> (ø)

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