docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -312,6 +312,7 @@ _Note: due to GitHub's limitations, this repository's [Contributors](https://git
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/toniab"><img src="https://avatars.githubusercontent.com/u/370199?v=4?s=120" width="120px;" alt="Tonz"/><br /><sub><b>Tonz</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=toniab" title="Code">💻</a> <a href="https://github.com/processing/processing4/commits?author=toniab" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/aj-m"><img src="https://avatars.githubusercontent.com/u/2524348?v=4?s=120" width="120px;" alt="Andrew"/><br /><sub><b>Andrew</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=aj-m" title="Code">💻</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/pnngocdoan"><img src="https://avatars.githubusercontent.com/u/113954980?v=4?s=120" width="120px;" alt="Ngoc Doan"/><br /><sub><b>Ngoc Doan</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=pnngocdoan" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="https://github.com/manoellribeiro"><img src="https://avatars.githubusercontent.com/u/59377764?v=4?s=120" width="120px;" alt="Manoel Ribeiro"/><br /><sub><b>Manoel Ribeiro</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=manoellribeiro" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>