docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -262,6 +262,9 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://maurom.dev"><img src="https://avatars1.githubusercontent.com/u/22800592?v=4" width="100px;" alt=""/><br /><sub><b>Mauro M.</b></sub></a><br /><a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=MM-coder" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/JKSenthil"><img src="https://avatars2.githubusercontent.com/u/12533226?v=4" width="100px;" alt=""/><br /><sub><b>JKSenthil</b></sub></a><br /><a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=JKSenthil" title="Code">💻</a> <a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=JKSenthil" title="Documentation">📖</a> <a href="https://github.com/ExpDev07/coronavirus-tracker-api/commits?author=JKSenthil" title="Tests">⚠️</a></td>
   </tr>
+  <tr>
+    <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>
+  </tr>
 </table>
 
 <!-- markdownlint-enable -->