Update stated Python requirement

[Andy-Grigg]

Update stated Python requirement to 3.10 to 3.13.

I did think about removing this entirely, since we have the badges that give the Python version. The badges are not in the HTML documentation though, so we probably need to keep this line in place,

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.63%. Comparing base (9a6be68) to head (a0e19f4).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #656   +/-   ##
=======================================
  Coverage   97.63%   97.63%           
=======================================
  Files          18       18           
  Lines        2533     2533           
=======================================
  Hits         2473     2473           
  Misses         60       60           

Flag	Coverage Δ
integration	83.10% <ø> (ø)
unittests	97.19% <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.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests