docs: add jonrimmer as a contributor (#229)

* docs: update README.md

* docs: update .all-contributorsrc

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -400,6 +400,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "jonrimmer",
+      "name": "Jon Rimmer",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/183786?v=4",
+      "profile": "https://twitter.com/jonrimmer",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "repoHost": "https://github.com",

README.md

@@ -953,12 +953,12 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="http://jeffbernstein.io"><img src="https://avatars1.githubusercontent.com/u/6685560?v=4" width="100px;" alt=""/><br /><sub><b>Jeff Bernstein</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=jeffbernst" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/SergiCL"><img src="https://avatars3.githubusercontent.com/u/41625166?v=4" width="100px;" alt=""/><br /><sub><b>Sergi</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=SergiCL" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=SergiCL" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://skovy.dev"><img src="https://avatars1.githubusercontent.com/u/5247455?v=4" width="100px;" alt=""/><br /><sub><b>Spencer Miskoviak</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=skovy" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://twitter.com/jonrimmer"><img src="https://avatars1.githubusercontent.com/u/183786?v=4" width="100px;" alt=""/><br /><sub><b>Jon Rimmer</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=jonrimmer" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=jonrimmer" title="Tests">⚠️</a></td>
   </tr>
 </table>
 
 <!-- markdownlint-enable -->
 <!-- prettier-ignore-end -->
-
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.