wanvideowarper Branch switching

1. install git
   https://git-scm.com/install/windows
2. open cmd or powershell

<!--replace your ComfyUI-WanVideoWrapper path   -->
<!--git checkout -b longcat origin/longcat  get the longcat branch  -->

E:\APP_install\ComfyUI\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-WanVideoWrapper>git checkout -b longcat origin/longcat
fatal: a branch named 'longcat' already exists

<!--checkout longcat success restart comfyui  -->
E:\APP_install\ComfyUI\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-WanVideoWrapper>git branch
* longcat 
  main
  ovi

E:\APP_install\ComfyUI\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-WanVideoWrapper>