docs: add LeGoffMael as a contributor for maintenance (#491)

Adds @LeGoffMael as a contributor for maintenance.

This was requested by AlexV525 [in this
comment](#42 (comment))

[skip ci]

---------

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -211,7 +211,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/22376981?v=4",
       "profile": "https://www.legoffmael.fr",
       "contributions": [
-        "code"
+        "code",
+        "maintenance"
       ]
     },
     {

README.md

@@ -560,7 +560,7 @@ Many thanks to these wonderful people ([emoji key](https://allcontributors.org/d
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/taqiabdulaziz"><img src="https://avatars.githubusercontent.com/u/30410316?v=4?s=50" width="50px;" alt="Muhammad Taqi Abdul Aziz"/><br /><sub><b>Muhammad Taqi Abdul Aziz</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=taqiabdulaziz" title="Documentation">📖</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/hellohejinyu"><img src="https://avatars.githubusercontent.com/u/8766034?v=4?s=50" width="50px;" alt="何锦余"/><br /><sub><b>何锦余</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3Ahellohejinyu" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/leonpesdk"><img src="https://avatars.githubusercontent.com/u/57394644?v=4?s=50" width="50px;" alt="Leon Dudlik"/><br /><sub><b>Leon Dudlik</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3Aleonpesdk" title="Bug reports">🐛</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.legoffmael.fr"><img src="https://avatars.githubusercontent.com/u/22376981?v=4?s=50" width="50px;" alt="Maël"/><br /><sub><b>Maël</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=LeGoffMael" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.legoffmael.fr"><img src="https://avatars.githubusercontent.com/u/22376981?v=4?s=50" width="50px;" alt="Maël"/><br /><sub><b>Maël</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=LeGoffMael" title="Code">💻</a> <a href="#maintenance-LeGoffMael" title="Maintenance">🚧</a></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/dddrop"><img src="https://avatars.githubusercontent.com/u/5361175?v=4?s=50" width="50px;" alt="dddrop"/><br /><sub><b>dddrop</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=dddrop" title="Code">💻</a></td>