update screenshots

README-zh_CN.md

@@ -62,7 +62,7 @@ Nginx 网络管理界面，由  [0xJacky](https://jackyu.cn/) 与 [Hintay](https
 
 ## 关于项目
 
-[![Dashboard](resources/screenshots/dashboard.png)]()
+[![Dashboard](resources/screenshots/dashboard_zh_CN.png)]()
 
 ### 在线预览
 网址：[https://nginxui.jackyu.cn](https://nginxui.jackyu.cn)

README.md

@@ -60,7 +60,7 @@ Yet another Nginx Web UI, developed by [0xJacky](https://jackyu.cn/) and [Hintay
 
 ## About The Project
 
-[![Dashboard](resources/screenshots/dashboard.png)]()
+[![Dashboard](resources/screenshots/dashboard_en.png)]()
 
 ### Demo
 URL：[https://nginxui.jackyu.cn](https://nginxui.jackyu.cn)