New review comment by endigma on void-packages repository

https://github.com/void-linux/void-packages/pull/29326#discussion_r592889323

Comment:
docker-engine and moby are synonyms as far as docker is concerned, they have a mirror set up from `docker/engine` to `moby/moby`. I figured I'd use this name so that queries for docker related packages return the correct results. Otherwise something like a dummy package might be required, and calling the package `moby` has no real benefit since nothing else depends on this sort of thing.

I'll update the github url in the distfiles to be the docker/engine mirror as this may be more accurate for maintainers, as the `moby` repo may not always match with docker release cycles.