Update python set up step in workflows to use latest python version

[frances-h]

Resolve #139

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.26%. Comparing base (a41626c) to head (c9cc333).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #152      +/-   ##
==========================================
- Coverage   86.40%   86.26%   -0.14%     
==========================================
  Files           7        7              
  Lines         728      728              
==========================================
- Hits          629      628       -1     
- Misses         99      100       +1     

Flag	Coverage Δ
integration	79.12% <ø> (-0.14%)	⬇️
unit	22.25% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.