docs: readme

Author: funnyzak

README.md

@@ -12,9 +12,9 @@
 ## 预览
 
 - [模型自动拆分展示/爆炸效果](https://funnyzak.github.io/threejs-model-tutorial/#/tutorial/dismantling2)
-  ![效果预览](https://raw.githubusercontent.com/funnyzak/threejs-model-tutorial/main/public/assets/imgs/dismantling2.gif)
+  ![效果预览](https://raw.githubusercontent.com/funnyzak/threejs-model-tutorial/dev/public/assets/imgs/dismantling2.gif)
 - [模型自动拆分展示/爆炸效果](https://funnyzak.github.io/threejs-model-tutorial/#/tutorial/dismantling)
-  ![效果预览](https://raw.githubusercontent.com/funnyzak/threejs-model-tutorial/main/public/assets/imgs/dismantling.gif)
+  ![效果预览](https://raw.githubusercontent.com/funnyzak/threejs-model-tutorial/dev/public/assets/imgs/dismantling.gif)
 
 ## 使用