docs: add mvasin as a contributor (#578)

* 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

@@ -483,6 +483,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "mvasin",
+      "name": "Mikhail Vasin",
+      "avatar_url": "https://avatars.githubusercontent.com/u/12434833?v=4",
+      "profile": "https://www.linkedin.com/in/mike-vasin/",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "skipCi": true,

README.md

@@ -236,6 +236,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   </tr>
   <tr>
     <td align="center"><a href="https://seanbaines.com/"><img src="https://avatars.githubusercontent.com/u/24367010?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sean Baines</b></sub></a><br /><a href="https://github.com/testing-library/react-hooks-testing-library/commits?author=mrseanbaines" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://www.linkedin.com/in/mike-vasin/"><img src="https://avatars.githubusercontent.com/u/12434833?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Mikhail Vasin</b></sub></a><br /><a href="https://github.com/testing-library/react-hooks-testing-library/commits?author=mvasin" title="Documentation">📖</a></td>
   </tr>
 </table>