[Docs] add missing comma

[RyanGst]

add missing comma in README.md, so it's easier to copy/paste

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.82%. Comparing base (8b2d570) to head (cff7b85).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3122      +/-   ##
==========================================
- Coverage   95.04%   94.82%   -0.23%     
==========================================
  Files          84       84              
  Lines        3634     3634              
  Branches     1279     1279              
==========================================
- Hits         3454     3446       -8     
- Misses        180      188       +8     

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[RyanGst]

Thanks for approving it @ljharb, do you want me to do anything else before merging?

[ljharb]

nope, you're good :-)