ci(python): bump target python for ci workflows

[d33bs]

Description

This PR bumps the Python version used for CI workflows.

Closes #434

What is the nature of your change?

• Bug fix (fixes an issue).
• Enhancement (adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).
• This change requires a documentation update.

Checklist

Please ensure that all boxes are checked before indicating that a pull request is ready for review.

• I have read the CONTRIBUTING.md guidelines.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• New and existing unit tests pass locally with my changes.
• I have added tests that prove my fix is effective or that my feature works.
• I have deleted all non-relevant text in this pull request template.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.42%. Comparing base (b558b39) to head (9c3cd7b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #486      +/-   ##
==========================================
- Coverage   94.74%   94.42%   -0.32%     
==========================================
  Files          57       57              
  Lines        3156     3156              
==========================================
- Hits         2990     2980      -10     
- Misses        166      176      +10     

Flag	Coverage Δ
unittests	94.42% <ø> (-0.32%)	⬇️

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[kenibrewer]

LGTM

[d33bs]

Thanks @kenibrewer! Merging this in.