ReadtheDocs Python Version Upgrade

[f-allian]

This pull request makes a minor update to the documentation build configuration by upgrading the Python version used in Read the Docs from 3.9 to 3.10.

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	33		0	0.92s
✅ PYTHON	pylint	33		0	5.73s

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.29%. Comparing base (6d5fbff) to head (8436da4).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #362   +/-   ##
=======================================
  Coverage   96.29%   96.29%           
=======================================
  Files          28       28           
  Lines        1591     1591           
=======================================
  Hits         1532     1532           
  Misses         59       59           

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