docs: Fix badge

[codecov[bot]]

Codecov Report

Patch and project coverage have no change.

Comparison is base (719f5ac) 87.93% compared to head (af70398) 87.93%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #13 +/- ## ======================================= Coverage 87.93% 87.93% ======================================= Files 3 3 Lines 232 232 Branches 9 9 ======================================= Hits 204 204 Misses 28 28 ```

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[github-actions[bot]]

:tada: This PR is included in version 1.0.0-beta.3 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: