remove deprecated version specifier for Docker v2 #902
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What type of PR is this?
What this PR does / why we need it:
The Docker Compose v2 version "version: x.x" key/value pair is obsolete according to Docker Compose's v2 spec:
https://github.com/compose-spec/compose-spec/blob/master/spec.md#version-and-name-top-level-elements
Updated reference in both the documentation and the main docker-compose.yml file.
Which issue(s) this PR fixes:
Fixes #901
Release Notes