Update python ci version to 3.14

[huangsam]

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Update python ci version to 3.14

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See whether it works or not, given that it just came out recently.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (681a354) to head (9886d51).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #141   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           36        36           
  Lines         1161      1153    -8     
  Branches        62        62           
=========================================
- Hits          1161      1153    -8     

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