docs: add Ishaan28malik as a contributor (#649)

Author: allcontributors[bot]

.all-contributorsrc

@@ -1054,6 +1054,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "Ishaan28malik",
+      "name": "Championrunner",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/27343592?v=4",
+      "profile": "https://ghuser.io/Ishaan28malik",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -534,6 +534,7 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/hottmanmichael"><img src="https://avatars3.githubusercontent.com/u/10534502?v=4" width="100px;" alt=""/><br /><sub><b>Michael Hottman</b></sub></a><br /><a href="#ideas-hottmanmichael" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://github.com/stevenfitzpatrick"><img src="https://avatars0.githubusercontent.com/u/23268855?v=4" width="100px;" alt=""/><br /><sub><b>Steven Fitzpatrick</b></sub></a><br /><a href="https://github.com/testing-library/react-testing-library/issues?q=author%3Astevenfitzpatrick" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/juangl"><img src="https://avatars0.githubusercontent.com/u/1887029?v=4" width="100px;" alt=""/><br /><sub><b>Juan Je García</b></sub></a><br /><a href="https://github.com/testing-library/react-testing-library/commits?author=juangl" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://ghuser.io/Ishaan28malik"><img src="https://avatars3.githubusercontent.com/u/27343592?v=4" width="100px;" alt=""/><br /><sub><b>Championrunner</b></sub></a><br /><a href="https://github.com/testing-library/react-testing-library/commits?author=Ishaan28malik" title="Documentation">📖</a></td>
   </tr>
 </table>