docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1858,6 +1858,9 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/stolab"><img src="https://avatars.githubusercontent.com/u/144235139?v=4?s=100" width="100px;" alt="stolab"/><br /><sub><b>stolab</b></sub></a><br /><a href="#content-stolab" title="Content">🖋</a></td>
       <td align="center" valign="top" width="14.28%"><a href="http://www.jacobjelen.com"><img src="https://avatars.githubusercontent.com/u/6750124?v=4?s=100" width="100px;" alt="jacobjelen"/><br /><sub><b>jacobjelen</b></sub></a><br /><a href="https://github.com/ethereum/ethereum-org-website/issues?q=author%3Ajacobjelen" title="Bug reports">🐛</a></td>
     </tr>
+    <tr>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Dennayz"><img src="https://avatars.githubusercontent.com/u/58843979?v=4?s=100" width="100px;" alt="Dennis Zhang"/><br /><sub><b>Dennis Zhang</b></sub></a><br /><a href="#tool-Dennayz" title="Tools">🔧</a></td>
+    </tr>
   </tbody>
 </table>