docs: update README.md [skip ci]

Author: allcontributors[bot]

README.md

@@ -1,4 +1,7 @@
 # [Timetabl](https://www.timetabl.app)
+<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors-)
+<!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fdebater-coder%2Ftimetabl-app&env=VITE_CLIENT_ID&envDescription=The%20client%20id%20you%20entered%20in%20the%20student%20portal.)
 
@@ -26,6 +29,20 @@ Timetabl is built on three principles:
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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+<table>
+  <tbody>
+    <tr>
+      <td align="center"><a href="https://github.com/wensenfriendandextra"><img src="https://avatars.githubusercontent.com/u/23128324?v=4?s=100" width="100px;" alt="Wansen Dong"/><br /><sub><b>Wansen Dong</b></sub></a><br /><a href="https://github.com/debater-coder/timetabl-app/commits?author=wensenfriendandextra" title="Code">💻</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
 
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