DOC: Correct grammar issues in documentation

[star1327p]

Correct grammar issues in documentation

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.35%. Comparing base (616519a) to head (6014c6f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #703      +/-   ##
==========================================
+ Coverage   75.32%   75.35%   +0.02%     
==========================================
  Files         111      111              
  Lines        9424     9424              
==========================================
+ Hits         7099     7101       +2     
+ Misses       2325     2323       -2     

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