[docs] Update the Docker version in the docs

[d0ugal]

I was following the documentation and it had me install v1.1.0 which is quite old now.

https://m3db.io/docs/quickstart/docker/

What this PR does / why we need it:

The quickstart documentation has users install a old version of M3

Special notes for your reviewer:

Does this PR introduce a user-facing and/or backwards incompatible change?: N/A

Does this PR require updating code package or user-facing documentation?: It updates documentation only

[CLAassistant]

All committers have signed the CLA.