docs: add deadkff01 as a contributor (#546)

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -837,6 +837,15 @@
  "contributions": [
  "doc"
  ]
+ },
+ {
+ "login": "deadkff01",
+ "name": "Dennis Kaffer",
+ "avatar_url": "https://avatars2.githubusercontent.com/u/5138179?v=4",
+ "profile": "https://github.com/deadkff01",
+ "contributions": [
+ "doc"
+ ]
  }
  ],
  "contributorsPerLine": 7,

README.md

@@ -153,6 +153,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
  </tr>
  <tr>
  <td align="center"><a href="https://github.com/BatuhanW"><img src="https://avatars3.githubusercontent.com/u/16444991?v=4" width="100px;" alt=""/><br /><sub><b>Batuhan Wilhelm</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=BatuhanW" title="Documentation">📖</a></td>
+ <td align="center"><a href="https://github.com/deadkff01"><img src="https://avatars2.githubusercontent.com/u/5138179?v=4" width="100px;" alt=""/><br /><sub><b>Dennis Kaffer</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=deadkff01" title="Documentation">📖</a></td>
  </tr>
 </table>