[Doc] Add example and openxlab link for just dance (#2571)

projects/README.md

@@ -54,7 +54,11 @@ We also provide some documentation listed below to help you get started:
   <img src="https://user-images.githubusercontent.com/13503330/231416285-5467d313-0732-4ada-97e1-12be6ec69a28.png" width="800"/>
   </div><br/>
 
-- **[💃Just-Dance](./just_dance)**: Enhancing Dance scoring system for comparing dance performances in videos
+- **[💃Just-Dance](./just_dance)**: Enhancing Dance scoring system for comparing dance performances in videos. <sup>
+  <a href="https://openxlab.org.cn/apps/detail/mmpose/just_dance-mmpose">
+  <i>TRY IT NOW</i>
+  </a>
+  </sup>
 
   <div align=center>
   <img src="https://github.com/open-mmlab/mmpose/assets/26127467/a80978ad-c66d-4bac-bf56-1fa191716f1c" width="800" style="width: 800px; height: 200px; object-fit: cover"/>

projects/just_dance/README.md

@@ -1,10 +1,18 @@
 # Just Dance - A Simple Implementation
 
+<sup>
+   <a href="https://openxlab.org.cn/apps/detail/mmpose/just_dance-mmpose">
+      <i>Try it on OpenXLab</i>
+   </a>
+</sup>
+
 This project presents a dance scoring system based on RTMPose. Users can compare the similarity between two dancers in different videos: one referred to as the "teacher video" and the other as the "student video."
 
-Here is an example of the output dance comparison:
+Here are examples of the output dance comparison:
+
+<img src="https://github.com/open-mmlab/mmpose/assets/26127467/56d5c4d1-55d8-4222-b481-2418cc29a8d4" width="600"/>
 
-![output](https://github.com/open-mmlab/mmpose/assets/26127467/56d5c4d1-55d8-4222-b481-2418cc29a8d4)
+<img src="https://github.com/open-mmlab/mmpose/assets/26127467/f93b94c7-529f-4704-8246-c3c812f4c31a" width="600"/>
 
 ## Usage