Fix typo in README.md

[t1m0thyj]

Also test Codecov for PR opened from fork 🙂

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.72%. Comparing base (9c6338b) to head (75dfae1).
Report is 167 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #297   +/-   ##
=======================================
  Coverage   89.72%   89.72%           
=======================================
  Files          53       53           
  Lines        2677     2677           
=======================================
  Hits         2402     2402           
  Misses        275      275           

Flag	Coverage Δ
unittests	89.72% <ø> (ø)

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