docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1067,10 +1067,11 @@ We recognize all types of contributions. This project follows the [all-contribut
       <td align="center" valign="top" width="16.66%"><a href="http://computationalmama.xyz"><img src="https://avatars.githubusercontent.com/u/10388784?v=4?s=120" width="120px;" alt="computational mama"/><br /><sub><b>computational mama</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=computationalmama" title="Code">💻</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://fabianmoronzirfas.me"><img src="https://avatars.githubusercontent.com/u/315106?v=4?s=120" width="120px;" alt="Fabian Morón Zirfas"/><br /><sub><b>Fabian Morón Zirfas</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=ff6347" title="Documentation">📖</a> <a href="https://github.com/processing/p5.js/commits?author=ff6347" title="Code">💻</a></td>
       <td align="center" valign="top" width="16.66%"><a href="http://www.lukeplowden.com"><img src="https://avatars.githubusercontent.com/u/62835749?v=4?s=120" width="120px;" alt="Luke Plowden"/><br /><sub><b>Luke Plowden</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=lukeplowden" title="Code">💻</a></td>
-      <td align="center" valign="top" width="16.66%"><a href="https://github.com/martinleopold"><img src="https://avatars.githubusercontent.com/u/1692826?v=4?s=120" width="120px;" alt="Martin Leopold Groedl"/><br /><sub><b>Martin Leopold Groedl</b></sub></a><br /><a href="https://github.com/processing/p5.js/issues?q=author%3Amartinleopold" title="Bug reports">🐛</a> <a href="https://github.com/processing/p5.js/commits?author=martinleopold" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="https://groedl.xyz"><img src="https://avatars.githubusercontent.com/u/1692826?v=4?s=120" width="120px;" alt="Martin Leopold Groedl"/><br /><sub><b>Martin Leopold Groedl</b></sub></a><br /><a href="https://github.com/processing/p5.js/issues?q=author%3Amartinleopold" title="Bug reports">🐛</a> <a href="https://github.com/processing/p5.js/commits?author=martinleopold" title="Code">💻</a></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="16.66%"><a href="https://www.linkedin.com/in/ashish1729/"><img src="https://avatars.githubusercontent.com/u/10610651?v=4?s=120" width="120px;" alt="ashish singh"/><br /><sub><b>ashish singh</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=ashish1729" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="http://alexhennings.dev"><img src="https://avatars.githubusercontent.com/u/31355456?v=4?s=120" width="120px;" alt="blackboxlogic"/><br /><sub><b>blackboxlogic</b></sub></a><br /><a href="https://github.com/processing/p5.js/commits?author=blackboxlogic" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>