docs: update README.md

Author: allcontributors[bot]

README.md

@@ -260,6 +260,7 @@ Thanks goes to these people ([emoji key][emojis]):
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     <td align="center"><a href="https://github.com/appleJax"><img src="https://avatars1.githubusercontent.com/u/13618860?v=4" width="100px;" alt=""/><br /><sub><b>Kevin Brewer</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=appleJax" title="Code">💻</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=appleJax" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/benmonro"><img src="https://avatars3.githubusercontent.com/u/399236?v=4" width="100px;" alt=""/><br /><sub><b>Ben Monro</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=benmonro" title="Code">💻</a> <a href="#ideas-benmonro" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=benmonro" title="Tests">⚠️</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=benmonro" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/smeijer"><img src="https://avatars1.githubusercontent.com/u/1196524?v=4" width="100px;" alt=""/><br /><sub><b>Stephan Meijer</b></sub></a><br /><a href="#ideas-smeijer" title="Ideas, Planning, & Feedback">🤔</a></td>
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