docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1851,6 +1851,7 @@ 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/mingoing"><img src="https://avatars.githubusercontent.com/u/344175?v=4?s=100" width="100px;" alt="Mingo"/><br /><sub><b>Mingo</b></sub></a><br /><a href="https://github.com/ethereum/ethereum-org-website/commits?author=mingoing" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/zkVlad"><img src="https://avatars.githubusercontent.com/u/125317045?v=4?s=100" width="100px;" alt="zkVlad"/><br /><sub><b>zkVlad</b></sub></a><br /><a href="https://github.com/ethereum/ethereum-org-website/commits?author=zkVlad" title="Documentation">📖</a></td>
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