DEV: Update to urllib3 2.6.3

[stefan6419846]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.31%. Comparing base (f189f07) to head (13f6a36).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3593   +/-   ##
=======================================
  Coverage   97.31%   97.31%           
=======================================
  Files          55       55           
  Lines        9769     9769           
  Branches     1780     1780           
=======================================
  Hits         9507     9507           
  Misses        155      155           
  Partials      107      107           

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