docs: fix typos

[aski02]

Fixed typos (#244).

Just regenerating the docs should fix the empty pages in the documentation.
(f.e. https://quanda.readthedocs.io/en/latest/docs_api/quanda.benchmarks.ground_truth.linear_datamodeling.html)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.11%. Comparing base (4a3af4a) to head (f24ebd6).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #250   +/-   ##
=======================================
  Coverage   92.11%   92.11%           
=======================================
  Files          55       55           
  Lines        2345     2345           
=======================================
  Hits         2160     2160           
  Misses        185      185           

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