docs: add prestoncarman as a contributor (testing-library#765)

* docs: update README.md [skip ci] * docs: update .all-contributorsrc [skip ci] Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -1256,6 +1256,15 @@
  "contributions": [
  "doc"
  ]
+ },
+ {
+ "login": "prestoncarman",
+ "name": "Preston Carman",
+ "avatar_url": "https://avatars.githubusercontent.com/u/3517157?v=4",
+ "profile": "https://github.com/prestoncarman",
+ "contributions": [
+ "doc"
+ ]
  }
  ],
  "contributorsPerLine": 7,

README.md

@@ -309,6 +309,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
  <td align="center"><a href="http://mayankjethva.xyz"><img src="https://avatars.githubusercontent.com/u/1103708?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mayank Jethva</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=mayank23" title="Documentation">📖</a></td>
  <td align="center"><a href="https://github.com/EladIsraeli"><img src="https://avatars.githubusercontent.com/u/13487086?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Elad Israeli</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=EladIsraeli" title="Documentation">📖</a></td>
  <td align="center"><a href="https://francischartrand.com"><img src="https://avatars.githubusercontent.com/u/1503758?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Francis Chartrand</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=chartrandf" title="Documentation">📖</a></td>
+ <td align="center"><a href="https://github.com/prestoncarman"><img src="https://avatars.githubusercontent.com/u/3517157?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Preston Carman</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=prestoncarman" title="Documentation">📖</a></td>
  </tr>
 </table>