docs: add jankalfus as a contributor for doc (testing-library#915)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -1564,6 +1564,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "jankalfus",
+      "name": "Honza Kalfus",
+      "avatar_url": "https://avatars.githubusercontent.com/u/12714276?v=4",
+      "profile": "https://github.com/jankalfus",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -359,6 +359,7 @@ Thanks goes to these wonderful people
     <td align="center"><a href="https://fildon.me"><img src="https://avatars.githubusercontent.com/u/10462288?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Rupert McKay</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=fildon" title="Documentation">📖</a></td>
     <td align="center"><a href="http://www.sebastianmaciel.com"><img src="https://avatars.githubusercontent.com/u/4841148?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sebastián Maciel</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=SebastianMaciel" title="Documentation">📖</a></td>
     <td align="center"><a href="http://sidharth.dev"><img src="https://avatars.githubusercontent.com/u/10703445?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Sidharth Vinod</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=sidharthv96" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/jankalfus"><img src="https://avatars.githubusercontent.com/u/12714276?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Honza Kalfus</b></sub></a><br /><a href="https://github.com/testing-library/testing-library-docs/commits?author=jankalfus" title="Documentation">📖</a></td>
   </tr>
 </table>