Update Docker EE to Mirantis Container Runtime

[ericgregory]

PR to update enterprise recommendation per issue 73.

[sam-thibault]

@ericgregory Thanks for contributing. Can you please sign off your commit to pass the DCO check? Instructions are here:

• https://github.com/moby/mobywebsite/pull/74/checks

[ericgregory]

@sam-thibault Thanks, and done! Just let me know if you need anything else here.