GHA: Test with Python3.14

[dweindl]

Reverts 1e20a12.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.46%. Comparing base (d57d9fe) to head (441897e).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #472   +/-   ##
=======================================
  Coverage   75.46%   75.46%           
=======================================
  Files          62       62           
  Lines        6895     6895           
  Branches     1227     1227           
=======================================
  Hits         5203     5203           
  Misses       1221     1221           
  Partials      471      471           

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