[release-1.30] Bump traefik to v2.11.20

[brandond]

Proposed Changes

Bump traefik to v2.11.20 - fixes an apparent memory leak.

Types of Changes

version bump

Verification

check version

Testing

Linked Issues

• [Release-1.30] - Memory never goes down in traefik version 2.11.18, need to upgrade to 2.11.19 #11761

User-Facing Change

Further Comments

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.32%. Comparing base (b6ee730) to head (6b4627d).
Report is 1 commits behind head on release-1.30.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.30   #11764      +/-   ##
================================================
- Coverage         48.00%   45.32%   -2.68%     
================================================
  Files               206      206              
  Lines             19688    19688              
================================================
- Hits               9451     8924     -527     
- Misses             8859     9458     +599     
+ Partials           1378     1306      -72     

Flag	Coverage Δ
e2etests	38.99% <ø> (-4.96%)	⬇️
inttests	34.85% <ø> (+16.31%)	⬆️
unittests	16.12% <ø> (ø)

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