Update Table of Contents

[GeorchW]

Btw, for me some VSCode extension (probably Markdown All in One) tries to update the table of contents to match the titles of the sections. I reverted these changes for now, but: is it intentional that they don't match?
-- @GeorchW, #390 (comment)

...

I am merging this, if you decide to fix the TOC, feel free to send another PR. Thank you!
-- @molefrog, #390 (review)

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Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (5c232aa) 100.00% compared to head (243e03d) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #405   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines          226       226           
  Branches        56        56           
=========================================
  Hits           226       226           

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[molefrog]

Thank you!