docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -287,6 +287,7 @@ Add yourself to the contributors list [here](https://github.com/processing/proce
       <td align="center" valign="top" width="16.66%"><a href="http://benjaminfoxstudios.com"><img src="https://avatars.githubusercontent.com/u/234190?v=4?s=120" width="120px;" alt="Benjamin Fox"/><br /><sub><b>Benjamin Fox</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=tracerstar" title="Code">💻</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/e1dem"><img src="https://avatars.githubusercontent.com/u/32488297?v=4?s=120" width="120px;" alt="e1dem"/><br /><sub><b>e1dem</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=e1dem" title="Code">💻</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/inteqam"><img src="https://avatars.githubusercontent.com/u/104833943?v=4?s=120" width="120px;" alt="Aditya Chaudhary"/><br /><sub><b>Aditya Chaudhary</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=inteqam" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="https://github.com/Rishab87"><img src="https://avatars.githubusercontent.com/u/138858208?v=4?s=120" width="120px;" alt="Rishab Kumar Jha"/><br /><sub><b>Rishab Kumar Jha</b></sub></a><br /><a href="https://github.com/processing/processing4/commits?author=Rishab87" title="Code">💻</a></td>
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