Fix Sphinx docs warnings

[JSCU-CNI]

Fixes #115

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.33%. Comparing base (a315c88) to head (aa919c9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #116   +/-   ##
=======================================
  Coverage   92.33%   92.33%           
=======================================
  Files          20       20           
  Lines        2180     2180           
=======================================
  Hits         2013     2013           
  Misses        167      167           

Flag	Coverage Δ
unittests	92.33% <ø> (ø)

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