docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1994,6 +1994,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
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       <td align="center" valign="top" width="14.28%"><a href="https://github.com/brossetti1"><img src="https://avatars.githubusercontent.com/u/5998100?v=4?s=100" width="100px;" alt="Brian Rossetti"/><br /><sub><b>Brian Rossetti</b></sub></a><br /><a href="#maintenance-brossetti1" title="Maintenance">🚧</a> <a href="https://github.com/ethereum/ethereum-org-website/commits?author=brossetti1" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/Antoine-Sparenberg"><img src="https://avatars.githubusercontent.com/u/128523213?v=4?s=100" width="100px;" alt="Antoine-Sparenberg"/><br /><sub><b>Antoine-Sparenberg</b></sub></a><br /><a href="#maintenance-Antoine-Sparenberg" title="Maintenance">🚧</a></td>
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