docs: add mlz11 as a contributor for code, and test (#485)

* 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]

Diff for: .all-contributorsrc

@@ -400,6 +400,16 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "mlz11",
+      "name": "Mahdi Lazraq",
+      "avatar_url": "https://avatars.githubusercontent.com/u/94069699?v=4",
+      "profile": "https://github.com/mlz11",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "contributorsPerLine": 7,

Diff for: README.md

@@ -268,6 +268,7 @@ Thanks goes to these people ([emoji key][emojis]):
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/mumenthalers"><img src="https://avatars.githubusercontent.com/u/3604424?v=4?s=100" width="100px;" alt="S. Mumenthaler"/><br /><sub><b>S. Mumenthaler</b></sub></a><br /><a href="https://github.com/testing-library/angular-testing-library/commits?author=mumenthalers" title="Code">💻</a> <a href="https://github.com/testing-library/angular-testing-library/commits?author=mumenthalers" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://lets.poker/"><img src="https://avatars.githubusercontent.com/u/697707?v=4?s=100" width="100px;" alt="Andrei Alecu"/><br /><sub><b>Andrei Alecu</b></sub></a><br /><a href="https://github.com/testing-library/angular-testing-library/commits?author=andreialecu" title="Code">💻</a> <a href="#ideas-andreialecu" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/testing-library/angular-testing-library/commits?author=andreialecu" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/Hyperxq"><img src="https://avatars.githubusercontent.com/u/22332354?v=4?s=100" width="100px;" alt="Daniel Ramírez Barrientos"/><br /><sub><b>Daniel Ramírez Barrientos</b></sub></a><br /><a href="https://github.com/testing-library/angular-testing-library/commits?author=Hyperxq" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/mlz11"><img src="https://avatars.githubusercontent.com/u/94069699?v=4?s=100" width="100px;" alt="Mahdi Lazraq"/><br /><sub><b>Mahdi Lazraq</b></sub></a><br /><a href="https://github.com/testing-library/angular-testing-library/commits?author=mlz11" title="Code">💻</a> <a href="https://github.com/testing-library/angular-testing-library/commits?author=mlz11" title="Tests">⚠️</a></td>
     </tr>
   </tbody>
 </table>