Fix: updated the windows installation commands (nvim-lua#1101)

* Update README.md

* Update README.md

* Fix: updated the windows installation commands

Author: restray

README.md

@@ -81,13 +81,13 @@ git clone https://github.com/nvim-lua/kickstart.nvim.git "${XDG_CONFIG_HOME:-$HO
 If you're using `cmd.exe`:
 
 ```
-git clone https://github.com/nvim-lua/kickstart.nvim.git %localappdata%\nvim\
+git clone https://github.com/nvim-lua/kickstart.nvim.git "%localappdata%\nvim"
 ```
 
 If you're using `powershell.exe`
 
 ```
-git clone https://github.com/nvim-lua/kickstart.nvim.git $env:LOCALAPPDATA\nvim\
+git clone https://github.com/nvim-lua/kickstart.nvim.git "${env:LOCALAPPDATA}\nvim"
 ```
 
 </details>