update: en screenshot gif

EN_README.md

@@ -31,7 +31,7 @@
 ![PixiJS](https://img.shields.io/badge/PixiJS-E72264?style=flat&logo=pixijs&logoColor=white)
 
 <p align="center">
-  <img src="assets/screenshot.gif" alt="Game Demo" width="100%">
+  <img src="assets/en-US/screenshot.gif" alt="Game Demo" width="100%">
 </p>
 
 > **An AI-driven cultivation world simulator that aims to create a truly living, immersive xianxia world.**

README.md

@@ -35,7 +35,7 @@
 
 
 <p align="center">
-  <img src="assets/screenshot.gif" alt="游戏演示" width="100%">
+  <img src="assets/zh-CN/screenshot.gif" alt="游戏演示" width="100%">
 </p>
 
 > **一个AI驱动的修仙世界模拟器，旨在创造一个真正活着的、有沉浸感的仙侠世界。**