Fix path in CI badge.

[dajiaji]

No description provided.

[codecov]

Codecov Report

Merging #28 (9250412) into main (94bd70f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #28   +/-   ##
=======================================
  Coverage   88.47%   88.47%           
=======================================
  Files          13       13           
  Lines         746      746           
  Branches      172      172           
=======================================
  Hits          660      660           
  Misses         56       56           
  Partials       30       30           

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