Update CI items

[opoplawski]

• readthedocs config
• checkout@v4
• Use pip3 install --break-system-packages due to Python 3.12 change

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 4.08%. Comparing base (8e2f627) to head (956931a).
Report is 3 commits behind head on main.

❗ Current head 956931a differs from pull request most recent head e3ff32d. Consider uploading reports for the commit e3ff32d to get more accurate results

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Additional details and impacted files

@@           Coverage Diff            @@
##            main     #97      +/-   ##
========================================
- Coverage   4.09%   4.08%   -0.01%     
========================================
  Files         12      12              
  Lines       2150    2152       +2     
========================================
  Hits          88      88              
- Misses      2062    2064       +2     

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