docs: update README.md

Author: allcontributors[bot]

README.md

@@ -1362,6 +1362,9 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://jeremie.astori.fr"><img src="https://avatars.githubusercontent.com/u/113730?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jérémie Astori</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=astorije" title="Code">💻</a> <a href="#ideas-astorije" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/ashleyryan"><img src="https://avatars.githubusercontent.com/u/9469374?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Ashley Ryan</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=ashleyryan" title="Code">💻</a> <a href="#ideas-ashleyryan" title="Ideas, Planning, & Feedback">🤔</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="https://github.com/Dennis273"><img src="https://avatars.githubusercontent.com/u/19815164?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Dennis Chen</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=Dennis273" title="Code">💻</a></td>
+  </tr>
 </table>
 
 <!-- markdownlint-restore -->