docs: update README.md

Author: allcontributors[bot]

README.md

@@ -243,6 +243,7 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="http://pustovalov.dev"><img src="https://avatars2.githubusercontent.com/u/1568885?v=4" width="100px;" alt=""/><br /><sub><b>Pavel Pustovalov</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=pustovalov" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/apalaniuk"><img src="https://avatars1.githubusercontent.com/u/17710124?v=4" width="100px;" alt=""/><br /><sub><b>Adam Palaniuk</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=apalaniuk" title="Code">💻</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=apalaniuk" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/Yama-Tomo"><img src="https://avatars0.githubusercontent.com/u/4970917?v=4" width="100px;" alt=""/><br /><sub><b>Yama-Tomo</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=Yama-Tomo" title="Code">💻</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=Yama-Tomo" title="Tests">⚠️</a></td>
+    <td align="center"><a href="https://github.com/airjp73"><img src="https://avatars2.githubusercontent.com/u/25882770?v=4" width="100px;" alt=""/><br /><sub><b>Aaron Pettengill</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=airjp73" title="Code">💻</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=airjp73" title="Tests">⚠️</a></td>
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