docs: Update demo link

components/tree/index.en-US.md

@@ -92,4 +92,4 @@ Before `3.4.0`: The number of treeNodes can be very large, but when `checkable=t
 
 ### How to hide file icon when use showLine?
 
-File icon realize by using switcherIcon. You can overwrite the style to hide it: https://codesandbox.io/s/883vo47xp8
+File icon realize by using switcherIcon. You can overwrite the style to hide it: https://codesandbox.io/s/long-moon-go9e2

components/tree/index.zh-CN.md

@@ -93,4 +93,4 @@ subtitle: 树形控件
 
 ### 在 showLine 时，如何隐藏子节点图标？
 
-文件图标通过 switcherIcon 来实现，如果不需要你可以覆盖对应的样式：https://codesandbox.io/s/883vo47xp8
+文件图标通过 switcherIcon 来实现，如果不需要你可以覆盖对应的样式：https://codesandbox.io/s/long-moon-go9e2