Update README.md with cocoa version compat

[buenaflor]

#skip-changelog

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.00%. Comparing base (77ea64d) to head (0d62eb7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #290   +/-   ##
=======================================
  Coverage   77.00%   77.00%           
=======================================
  Files          39       39           
  Lines         635      635           
  Branches       86       86           
=======================================
  Hits          489      489           
  Misses        100      100           
  Partials       46       46           

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