docs: add Saul-Mirone as a contributor (#493)

* docs: update README.md

* docs: update .all-contributorsrc

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

.all-contributorsrc

@@ -656,6 +656,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "Saul-Mirone",
+      "name": "Mirone",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/10047788?v=4",
+      "profile": "http://saul-mirone.github.io/",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "commitConvention": "none",

README.md

@@ -596,12 +596,12 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://www.linkedin.com/in/luis-takahashi/"><img src="https://avatars0.githubusercontent.com/u/19766035?v=4" width="100px;" alt=""/><br /><sub><b>Luís Takahashi</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=luistak" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=luistak" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/jesujcastillom"><img src="https://avatars3.githubusercontent.com/u/7827281?v=4" width="100px;" alt=""/><br /><sub><b>Jesu Castillo</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=jesujcastillom" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=jesujcastillom" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://sarahdayan.dev"><img src="https://avatars1.githubusercontent.com/u/5370675?v=4" width="100px;" alt=""/><br /><sub><b>Sarah Dayan</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=sarahdayan" title="Documentation">📖</a></td>
+    <td align="center"><a href="http://saul-mirone.github.io/"><img src="https://avatars0.githubusercontent.com/u/10047788?v=4" width="100px;" alt=""/><br /><sub><b>Mirone</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3ASaul-Mirone" title="Bug reports">🐛</a></td>
   </tr>
 </table>
 
 <!-- markdownlint-enable -->
 <!-- prettier-ignore-end -->
-
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.