bugfix: update screenShot and update readme

Author: broccoli-97

README.md

@@ -1,15 +1,15 @@
 # YMind - Mind Map Editor
 
-[中文文档](README_zh.md)
+[简体中文](README_zh.md) | English
 
 A desktop mind map editor built with C++ and Qt6. Create, edit, and organize hierarchical mind maps with an intuitive interface featuring tabbed editing, multiple layout styles, undo/redo, and theme support.
 
 ## Screenshots
 
+![Screenshot](./img/AutoLayout.gif)
 ![Screenshot](./img/StartPage.png)
 ![Screenshot](./img/LightTheme.png)
 ![Screenshot](./img/DarkTheme.png)
-![Screenshot](./img/AutoLayout.gif)
 
 ## Features
 

README_zh.md

@@ -1,13 +1,15 @@
 # YMind - 思维导图编辑器
 
+简体中文 | [English](README.md)
+
 一款使用 C++ 和 Qt6 构建的桌面思维导图编辑器。支持创建、编辑和组织层次化的思维导图，提供直观的界面，具备多标签编辑、多种布局样式、撤销/重做以及主题切换等功能。
 
 ## 截图
 
+![截图](./img/AutoLayout.gif)
 ![截图](./img/StartPage.png)
 ![截图](./img/LightTheme.png)
 ![截图](./img/DarkTheme.png)
-![截图](./img/AutoLayout.gif)
 
 ## 功能特性