docs(README): update lcui.css screenshot
@@ -64,7 +64,7 @@ If you have the above problem solving experience, you can provide technical supp
![Hello, World!](https://lcui.lc-soft.io/static/images/screenshot-lcui-hello.png)
-[![LCUI.css](https://lcui.lc-soft.io/static/images/screenshot-lcui-css.png)](https://github.com/lc-ui/LCUI.css)
+[![LCUI.css](https://lcui.lc-soft.io/static/images/screenshot-lcui-css.gif)](https://github.com/lc-ui/LCUI.css)
[![LCFinder](https://lcui.lc-soft.io/static/images/screenshot-lcfinder.png)](https://github.com/lc-soft/LC-Finder)
