docs: add fvonbergen as a contributor for bug (#844)

* docs: update README.md [skip ci]

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

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -317,6 +317,13 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/103313934?v=4",
       "profile": "https://github.com/funkeleinhorn",
       "contributions": ["bug"]
+    },
+    {
+      "login": "fvonbergen",
+      "name": "fvonbergen",
+      "avatar_url": "https://avatars.githubusercontent.com/u/41888414?v=4",
+      "profile": "https://github.com/fvonbergen",
+      "contributions": ["bug"]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -343,6 +343,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://mkennedy.codes"><img src="https://avatars.githubusercontent.com/u/2035561?v=4?s=100" width="100px;" alt="Michael Kennedy"/><br /><sub><b>Michael Kennedy</b></sub></a><br /><a href="#audio-mikeckennedy" title="Audio">🔊</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://pythontest.com"><img src="https://avatars.githubusercontent.com/u/1568356?v=4?s=100" width="100px;" alt="Brian Okken"/><br /><sub><b>Brian Okken</b></sub></a><br /><a href="#audio-okken" title="Audio">🔊</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/funkeleinhorn"><img src="https://avatars.githubusercontent.com/u/103313934?v=4?s=100" width="100px;" alt="Sydney"/><br /><sub><b>Sydney</b></sub></a><br /><a href="https://github.com/nbQA-dev/nbQA/issues?q=author%3Afunkeleinhorn" title="Bug reports">🐛</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/fvonbergen"><img src="https://avatars.githubusercontent.com/u/41888414?v=4?s=100" width="100px;" alt="fvonbergen"/><br /><sub><b>fvonbergen</b></sub></a><br /><a href="https://github.com/nbQA-dev/nbQA/issues?q=author%3Afvonbergen" title="Bug reports">🐛</a></td>
     </tr>
   </tbody>
 </table>