chore: update README

README.md

@@ -146,7 +146,7 @@ Check out section [Explicit Gradient (EG)](#explicit-gradient-eg) functional API
 We design a bilevel-optimization updating scheme, which can be easily extended to realize various differentiable optimization processes.
 
 <div align="center">
-  <img src="image/diffmode.png" width="90%" />
+  <img src="https://github.com/metaopt/torchopt/raw/HEAD/image/diffmode.png" width="90%" />
 </div>
 
 As shown above, the scheme contains an outer level that has parameters $\phi$ that can be learned end-to-end through the inner level parameters solution $\theta^{\prime}(\phi)$ by using the best-response derivatives $\partial \theta^{\prime}(\phi) / \partial \phi$.
@@ -435,8 +435,25 @@ If you find TorchOpt useful, please cite it in your publications.
 ```
 
 ## The Team
-
-TorchOpt is a work by [Jie Ren](https://github.com/JieRen98), [Xidong Feng](https://github.com/waterhorse1), [Bo Liu](https://github.com/Benjamin-eecs), [Xuehai Pan](https://github.com/XuehaiPan), [Luo Mai](https://luomai.github.io), and [Yaodong Yang](https://www.yangyaodong.com).
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table class="fixed">
+  <tbody>
+  <tr>
+    <td align="center"><a href="https://github.com/JieRen98"><img src="https://avatars.githubusercontent.com/u/49299030?v=4" width="100px;" alt=""/><br /><sub><b>Jie Ren</b></sub></a></td>
+    <td align="center"><a href="https://github.com/waterhorse1"><img src="https://avatars.githubusercontent.com/u/27195540?v=4" width="100px;" alt=""/><br /><sub><b>Xidong Feng</b></sub></a></td>
+    <td align="center"><a href="https://benjamin-eecs.github.io/"><img src="https://avatars.githubusercontent.com/u/32269413?s=96&v=4" width="100px;" alt=""/><br /><sub><b>Bo Liu</b></sub></a></td>
+    <td align="center"><a href="https://github.com/XuehaiPan"><img src="https://avatars.githubusercontent.com/u/16078332?v=4" width="100px;" alt=""/><br /><sub><b>Xuehai Pan</b></sub></a></td>
+    <td align="center"><a href="https://luomai.github.io"><img src="https://avatars.githubusercontent.com/u/1136455?v=4" width="100px;" alt=""/><br /><sub><b>Luo Mai</b></sub></a></td>
+    <td align="center"><a href="https://www.yangyaodong.com"><img src="https://static.wixstatic.com/media/ddd18b_598a64ddffe14dbabd5432b765e811de~mv2.jpeg/v1/fill/w_312,h_312,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/WechatIMG27616.jpeg" width="100px;" alt=""/><br /><sub><b>Yaodong Yang</b></sub></a></td>
+  </tr>
+  </tbody>
+</table>
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
 
 ## License