docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -272,6 +272,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
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     <td align="center"><a href="https://github.com/SeanCena"><img src="https://avatars1.githubusercontent.com/u/17202203?v=4" width="100px;" alt=""/><br /><sub><b>SeanCena</b></sub></a><br /><a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=SeanCena" title="Code">💻</a> <a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=SeanCena" title="Documentation">📖</a> <a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=SeanCena" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/Abdirahiim"><img src="https://avatars0.githubusercontent.com/u/13730460?v=4" width="100px;" alt=""/><br /><sub><b>Abdirahiim Yassin </b></sub></a><br /><a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=Abdirahiim" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/kant"><img src="https://avatars1.githubusercontent.com/u/32717?v=4" width="100px;" alt=""/><br /><sub><b>Darío Hereñú</b></sub></a><br /><a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=kant" title="Documentation">📖</a></td>
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