docs: add gndelia as a contributor (#514)

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

.all-contributorsrc

@@ -685,6 +685,17 @@
         "test",
         "doc"
       ]
+    },
+    {
+      "login": "gndelia",
+      "name": "Gonzalo D'Elia",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/352474?v=4",
+      "profile": "https://github.com/gndelia",
+      "contributions": [
+        "code",
+        "test",
+        "doc"
+      ]
     }
   ],
   "commitConvention": "none",

README.md

@@ -631,12 +631,12 @@ Thanks goes to these people ([emoji key][emojis]):
     <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>
     <td align="center"><a href="https://github.com/amandapouget"><img src="https://avatars3.githubusercontent.com/u/12855692?v=4" width="100px;" alt=""/><br /><sub><b>Amanda Pouget</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=amandapouget" title="Documentation">📖</a></td>
     <td align="center"><a href="https://github.com/Sonic12040"><img src="https://avatars3.githubusercontent.com/u/21055893?v=4" width="100px;" alt=""/><br /><sub><b>Sonic12040</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=Sonic12040" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=Sonic12040" title="Tests">⚠️</a> <a href="https://github.com/testing-library/user-event/commits?author=Sonic12040" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/gndelia"><img src="https://avatars1.githubusercontent.com/u/352474?v=4" width="100px;" alt=""/><br /><sub><b>Gonzalo D'Elia</b></sub></a><br /><a href="https://github.com/testing-library/user-event/commits?author=gndelia" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=gndelia" title="Tests">⚠️</a> <a href="https://github.com/testing-library/user-event/commits?author=gndelia" title="Documentation">📖</a></td>
   </tr>
 </table>
 
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 This project follows the [all-contributors][all-contributors] specification.