docs: add AlexV525 as a contributor for a11y, and translation (#472)

Adds @AlexV525 as a contributor for a11y, translation.

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

@@ -19,7 +19,9 @@
         "ideas",
         "maintenance",
         "question",
-        "review"
+        "review",
+        "a11y",
+        "translation"
       ]
     },
     {

README.md

@@ -521,7 +521,7 @@ Many thanks to these wonderful people ([emoji key](https://allcontributors.org/d
 <table>
   <tbody>
     <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://blog.alexv525.com"><img src="https://avatars1.githubusercontent.com/u/15884415?v=4?s=50" width="50px;" alt="Alex Li"/><br /><sub><b>Alex Li</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=AlexV525" title="Code">💻</a> <a href="#design-AlexV525" title="Design">🎨</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=AlexV525" title="Documentation">📖</a> <a href="#example-AlexV525" title="Examples">💡</a> <a href="#ideas-AlexV525" title="Ideas, Planning, & Feedback">🤔</a> <a href="#maintenance-AlexV525" title="Maintenance">🚧</a> <a href="#question-AlexV525" title="Answering Questions">💬</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/pulls?q=is%3Apr+reviewed-by%3AAlexV525" title="Reviewed Pull Requests">👀</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://blog.alexv525.com"><img src="https://avatars1.githubusercontent.com/u/15884415?v=4?s=50" width="50px;" alt="Alex Li"/><br /><sub><b>Alex Li</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=AlexV525" title="Code">💻</a> <a href="#design-AlexV525" title="Design">🎨</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=AlexV525" title="Documentation">📖</a> <a href="#example-AlexV525" title="Examples">💡</a> <a href="#ideas-AlexV525" title="Ideas, Planning, & Feedback">🤔</a> <a href="#maintenance-AlexV525" title="Maintenance">🚧</a> <a href="#question-AlexV525" title="Answering Questions">💬</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/pulls?q=is%3Apr+reviewed-by%3AAlexV525" title="Reviewed Pull Requests">👀</a> <a href="#a11y-AlexV525" title="Accessibility">️️️️♿️</a> <a href="#translation-AlexV525" title="Translation">🌍</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://www.kikt.top"><img src="https://avatars0.githubusercontent.com/u/14145407?v=4?s=50" width="50px;" alt="Caijinglong"/><br /><sub><b>Caijinglong</b></sub></a><br /><a href="#example-CaiJingLong" title="Examples">💡</a> <a href="#ideas-CaiJingLong" title="Ideas, Planning, & Feedback">🤔</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/SchnMar"><img src="https://avatars3.githubusercontent.com/u/12902321?v=4?s=50" width="50px;" alt="Marcel Schneider"/><br /><sub><b>Marcel Schneider</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3ASchnMar" title="Bug reports">🐛</a> <a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/commits?author=SchnMar" title="Code">💻</a> <a href="#ideas-SchnMar" title="Ideas, Planning, & Feedback">🤔</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/ganlanshu0211"><img src="https://avatars0.githubusercontent.com/u/9670379?v=4?s=50" width="50px;" alt="ganlanshu0211"/><br /><sub><b>ganlanshu0211</b></sub></a><br /><a href="https://github.com/fluttercandies/flutter_wechat_assets_picker/issues?q=author%3Aganlanshu0211" title="Bug reports">🐛</a> <a href="#ideas-ganlanshu0211" title="Ideas, Planning, & Feedback">🤔</a></td>