Fix #5219: Change unsafe ARG example in compose file docs. (#5984)
Fix #5219: Change unsafe ARG example in compose file docs. (#5984)


JimGalasyn/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,londoncalling/docker.github.io,anweiss/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,JimGalasyn/docker.github.io,JimGalasyn/docker.github.io,JimGalasyn/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,johnstep/docker.github.io,docker/docker.github.io,docker/docker.github.io