update wsl to wsl2 ubuntu 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: wsl convert to wsl2

wsl --set-version <Distro> 2

# For setting all future distributions to use WSL 2
wsl --set-default-version 2