Fix sentence case in titles

[LinukaAr]

Purpose

This PR fixes some minor documentation issues.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.89%. Comparing base (3e94df2) to head (a3825bc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #6   +/-   ##
=======================================
  Coverage   67.89%   67.89%           
=======================================
  Files           3        3           
  Lines         461      461           
  Branches       66       66           
=======================================
  Hits          313      313           
  Misses        148      148           

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