docs: add ggualiato as a contributor for doc (#1400)

* 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]

.all-contributorsrc

@@ -2673,6 +2673,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "ggualiato",
+      "name": "Giovanni Gualiato",
+      "avatar_url": "https://avatars.githubusercontent.com/u/26698704?v=4",
+      "profile": "https://github.com/ggualiato",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -515,6 +515,7 @@ Thanks goes to these wonderful people
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/denisx"><img src="https://avatars.githubusercontent.com/u/427776?v=4?s=100" width="100px;" alt="denisx"/><br /><sub><b>denisx</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=denisx" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/ggualiato"><img src="https://avatars.githubusercontent.com/u/26698704?v=4?s=100" width="100px;" alt="Giovanni Gualiato"/><br /><sub><b>Giovanni Gualiato</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=ggualiato" title="Documentation">📖</a></td>
     </tr>
   </tbody>
 </table>