MAINT: Update CI

[bashtage]

Update actions
Ensure actions are kept up to date
Add run for Python 3.14

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.45%. Comparing base (331879f) to head (04dbea4).
⚠️ Report is 24 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #239      +/-   ##
==========================================
+ Coverage   97.60%   98.45%   +0.84%     
==========================================
  Files          30       30              
  Lines        3096     3103       +7     
  Branches      591      676      +85     
==========================================
+ Hits         3022     3055      +33     
+ Misses         39       27      -12     
+ Partials       35       21      -14     

Flag	Coverage Δ
unittests	98.06% <ø> (+0.45%)	⬆️

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