New review comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/29326#discussion_r592719724

Comment:
```suggestion
homepage="http://www.docker.io"
distfiles="https://github.com/docker/cli/archive/v${version}.tar.gz>cli-$version.tar.gz"
checksum=4ba845f8c7e2e0a2ca1ec6589847159ca8d0d37b609f0e6f78def7a893b9b342
system_groups="docker"
```