docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -198,6 +198,7 @@ Want to contribute? see [Contribution Guidelines][contribution]. Thanks goes to
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       <td align="center" valign="top" width="14.28%"><a href="https://github.com/amedve"><img src="https://avatars.githubusercontent.com/u/23156422?v=4?s=100" width="100px;" alt="Max Medve"/><br /><sub><b>Max Medve</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=amedve" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://maizzle.com"><img src="https://avatars.githubusercontent.com/u/1656595?v=4?s=100" width="100px;" alt="Cosmin Popovici"/><br /><sub><b>Cosmin Popovici</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=cossssmin" title="Documentation">📖</a></td>
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