Update README.md with individual steps and how to fix pyjson5 on Arch
Update README.md with individual steps and how to fix pyjson5 on Arch

Signed-off-by: Oguz Meteer <59bd0a3ff43b32849b319e645d4798d8a5d1e889@guztech.nl>

SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray,SymbiFlow/prjxray