switch to wsl2 linux code example

Example 1: switch installed linx to wsl2

wsl.exe --set-version Ubuntu 2

Example 2: switch wsl 2 to 1

# run following commands in admin-mode PowerShell
dism.exe /online /disable-feature /featurename:VirtualMachinePlatform /norestart
wsl --set-default-version 1