update wsl 2 code example

Example 1: update to wsl2

#enable wsl 
dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
#make sure windows version is >=2004
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
#restart
wsl --set-default-version 2
#if kernal error https://docs.microsoft.com/en-us/windows/wsl/wsl2-kernel

Example 2: switch installed linx to wsl2

wsl.exe --set-version Ubuntu 2

Example 3: enable wsl2

dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart

Example 4: update to wsl2 windows 10

Enable-WindowsOptionalFeature -Online -FeatureName VirtualMachinePlatform -NoRestart