Update README.md to fix version instructions
Update README.md to fix version instructions

Fixes #94, #85
mglaman/platformsh-cli,mglaman/platformsh-cli,Fredplais/platformsh-cli,supriyantomaftuh/platformsh-cli,dudenhofer/platform-cli,mglaman/platformsh-cli,OriPekelman/platformsh-cli,pjcdawkins/platformsh-cli,platformsh/platformsh-cli,pjcdawkins/platformsh-cli,Fredplais/platformsh-cli,dudenhofer/platform-cli,supriyantomaftuh/platformsh-cli,platformsh/platformsh-cli,OriPekelman/platformsh-cli,OriPekelman/platformsh-cli,Fredplais/platformsh-cli,supriyantomaftuh/platformsh-cli,pjcdawkins/platformsh-cli,platformsh/platformsh-cli