Update documentation for compose plugin (docker compose V2)

What does this MR do and why?

Updated documentation to reflect changes in docker compose.

In short:

• V1 docker-compose (with a dash) is deprecated
• V2 docker compose (without dash) is preferred

Source: https://www.docker.com/blog/announcing-compose-v2-general-availability/

This document also references docker compose installation guide, which shows the V2 installation. Accepting this MR will fix the inconsistency between external links to docker documentation and this document.

Screenshots or screen recordings

N/A

How to set up and validate locally

• install docker compose plugin
• run docker compose up

MR acceptance checklist

• I have evaluated the MR acceptance checklist for this MR.