docs: add matbcvo as a contributor for userTesting (mautic#13970)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

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

.all-contributorsrc

@@ -1336,7 +1336,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/1006437?v=4",
       "profile": "https://matbcvo.github.io",
       "contributions": [
-        "review"
+        "review",
+        "userTesting"
       ]
     }
   ],

README.md

@@ -247,7 +247,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/nishant-s7"><img src="https://avatars.githubusercontent.com/u/97207366?v=4?s=100" width="100px;" alt="nishant-s7"/><br /><sub><b>nishant-s7</b></sub></a><br /><a href="https://github.com/mautic/mautic/commits?author=nishant-s7" title="Code">💻</a></td>
     </tr>
     <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://matbcvo.github.io"><img src="https://avatars.githubusercontent.com/u/1006437?v=4?s=100" width="100px;" alt="Martin Vooremäe"/><br /><sub><b>Martin Vooremäe</b></sub></a><br /><a href="https://github.com/mautic/mautic/pulls?q=is%3Apr+reviewed-by%3Amatbcvo" title="Reviewed Pull Requests">👀</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://matbcvo.github.io"><img src="https://avatars.githubusercontent.com/u/1006437?v=4?s=100" width="100px;" alt="Martin Vooremäe"/><br /><sub><b>Martin Vooremäe</b></sub></a><br /><a href="https://github.com/mautic/mautic/pulls?q=is%3Apr+reviewed-by%3Amatbcvo" title="Reviewed Pull Requests">👀</a> <a href="#userTesting-matbcvo" title="User Testing">📓</a></td>
     </tr>
   </tbody>
 </table>