Fix command description for environment:relationships.
Fix command description for environment:relationships.

platformsh/platformsh-cli,supriyantomaftuh/platformsh-cli,supriyantomaftuh/platformsh-cli,platformsh/platformsh-cli,OriPekelman/platformsh-cli,mglaman/platformsh-cli,mglaman/platformsh-cli,Fredplais/platformsh-cli,dudenhofer/platform-cli,pjcdawkins/platformsh-cli,dudenhofer/platform-cli,Fredplais/platformsh-cli,platformsh/platformsh-cli,supriyantomaftuh/platformsh-cli,pjcdawkins/platformsh-cli,Fredplais/platformsh-cli,mglaman/platformsh-cli,OriPekelman/platformsh-cli,pjcdawkins/platformsh-cli,OriPekelman/platformsh-cli