docs(readme): fix grammar issue

[WuMingDao]

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (d457eca) to head (e3c169a).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2624   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2566      2566           
  Branches       651       651           
=========================================
  Hits          2566      2566           

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[WikiRik]

Thanks for willing to contribute to this project! Unfortunately I will be closing this PR as it's a low priority fix and I don't agree with all the changes. Later I want to do a bigger rewrite of the README where we will fix these issues