docs: add class-undefined as a contributor for bug (#404)

* docs: update packages/react-vant/README.md [skip ci]

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

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

.all-contributorsrc

@@ -244,6 +244,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "class-undefined",
+      "name": "野漫横江",
+      "avatar_url": "https://avatars.githubusercontent.com/u/58300575?v=4",
+      "profile": "https://github.com/class-undefined",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,

packages/react-vant/README.md

@@ -160,6 +160,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/GangYHu"><img src="https://avatars.githubusercontent.com/u/26001209?v=4?s=100" width="100px;" alt=""/><br /><sub><b>GangYHu</b></sub></a><br /><a href="https://github.com/3lang3/react-vant/issues?q=author%3AGangYHu" title="Bug reports">🐛</a></td>
     <td align="center"><a href="https://github.com/Jungzl"><img src="https://avatars.githubusercontent.com/u/35426360?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Jungzl</b></sub></a><br /><a href="https://github.com/3lang3/react-vant/commits?author=Jungzl" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/ZhaoTim"><img src="https://avatars.githubusercontent.com/u/30540533?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Tim Zhao</b></sub></a><br /><a href="https://github.com/3lang3/react-vant/commits?author=ZhaoTim" title="Documentation">📖</a></td>
+    <td align="center"><a href="https://github.com/class-undefined"><img src="https://avatars.githubusercontent.com/u/58300575?v=4?s=100" width="100px;" alt=""/><br /><sub><b>野漫横江</b></sub></a><br /><a href="https://github.com/3lang3/react-vant/issues?q=author%3Aclass-undefined" title="Bug reports">🐛</a></td>
   </tr>
 </table>