[DOC] Sort contributors alphabetically

* docs: update CONTRIBUTORS.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

@@ -19,7 +19,8 @@
       "contributions": [
         "code",
         "doc",
-        "test"
+        "test",
+        "example"
       ]
     },
     {

CONTRIBUTORS.md

@@ -8,10 +8,10 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
 <!-- markdownlint-disable -->
 <table>
   <tr>
-    <td align="center"><a href="https://github.com/xuyxu"><img src="https://avatars.githubusercontent.com/u/22359569?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yi-Xuan Xu</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Code">💻</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Documentation">📖</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Tests">⚠️</a></td>
-    <td align="center"><a href="https://github.com/zzzzwj"><img src="https://avatars.githubusercontent.com/u/23235538?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wenjie Zhang</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=zzzzwj" title="Code">💻</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=zzzzwj" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/mttgdd"><img src="https://avatars.githubusercontent.com/u/3154919?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Matt Gadd</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=mttgdd" title="Code">💻</a></td>
+    <td align="center"><a href="https://github.com/zzzzwj"><img src="https://avatars.githubusercontent.com/u/23235538?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Wenjie Zhang</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=zzzzwj" title="Code">💻</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=zzzzwj" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/Xiaohui9607"><img src="https://avatars.githubusercontent.com/u/37996225?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Xiaohui Chen</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/issues?q=author%3AXiaohui9607" title="Bug reports">🐛</a></td>
+    <td align="center"><a href="https://github.com/xuyxu"><img src="https://avatars.githubusercontent.com/u/22359569?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Yi-Xuan Xu</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Code">💻</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Documentation">📖</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=xuyxu" title="Tests">⚠️</a> <a href="#example-xuyxu" title="Examples">💡</a></td>
     <td align="center"><a href="https://github.com/cspsampedro"><img src="https://avatars.githubusercontent.com/u/7384605?v=4?s=100" width="100px;" alt=""/><br /><sub><b>cspsampedro</b></sub></a><br /><a href="#ideas-cspsampedro" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=cspsampedro" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/nolaurence"><img src="https://avatars.githubusercontent.com/u/53215736?v=4?s=100" width="100px;" alt=""/><br /><sub><b>nolaurence</b></sub></a><br /><a href="https://github.com/xuyxu/Ensemble-Pytorch/commits?author=nolaurence" title="Code">💻</a></td>
   </tr>