Fix Python 3.14 vanished from the test matrix

[DoctorJohn]

...I swear

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (083041f) to head (4fd9e87).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #42   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           52        52           
=========================================
  Hits            52        52           

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