New review comment by 0x5c on void-packages repository

https://github.com/void-linux/void-packages/pull/39864#discussion_r992841093

Comment:
This is not the way to specify user:primary_group. Instead, that line specifies a `_headscale` user twice.

Here's what the manual says about setting a primary group
> `<account>_pgroup` to set the primary group, by default primary group is set to `<account>`