README: fixes
README: fixes

Suggested by Joao Fernandes.

Signed-off-by: Akim Demaille <b98d595e8670f7809061ae067ba5f11e45ff9fd2@docker.com>

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