Fix badges in README.

[BigBlueHat]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 13.24%. Comparing base (8e53900) to head (21f6185).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #189   +/-   ##
=======================================
  Coverage   13.24%   13.24%           
=======================================
  Files          16       16           
  Lines         453      453           
=======================================
  Hits           60       60           
  Misses        393      393           

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