docs: add @aganglada as a contributor (#299)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -144,6 +144,15 @@
         "code",
         "ideas"
       ]
+    },
+    {
+      "login": "aganglada",
+      "name": "Alejandro Garcia Anglada",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/922348?v=4",
+      "profile": "https://aganglada.com",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -14,7 +14,7 @@ practices.
 
 <!-- prettier-ignore-start -->
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-14-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-15-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 <!-- prettier-ignore-end -->
 
@@ -156,6 +156,9 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/bmeverett"><img src="https://avatars2.githubusercontent.com/u/3941006?v=4" width="100px;" alt=""/><br /><sub><b>Brandon Everett</b></sub></a><br /><a href="https://github.com/testing-library/testing-playground/commits?author=bmeverett" title="Code">💻</a></td>
     <td align="center"><a href="http://brainbox.cz/"><img src="https://avatars1.githubusercontent.com/u/762095?v=4" width="100px;" alt=""/><br /><sub><b>Michal Kočárek</b></sub></a><br /><a href="https://github.com/testing-library/testing-playground/commits?author=michal-kocarek" title="Code">💻</a> <a href="#ideas-michal-kocarek" title="Ideas, Planning, & Feedback">🤔</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="https://aganglada.com"><img src="https://avatars0.githubusercontent.com/u/922348?v=4" width="100px;" alt=""/><br /><sub><b>Alejandro Garcia Anglada</b></sub></a><br /><a href="https://github.com/testing-library/testing-playground/commits?author=aganglada" title="Code">💻</a></td>
+  </tr>
 </table>
 
 <!-- markdownlint-enable -->