New review comment by paper42 on void-packages repository

https://github.com/void-linux/void-packages/pull/31549#discussion_r654988589

Comment:
> I'm pretty sure it should be `_pipewire`.

I am not sure, I think _pipewire would be used for a group which users do not have to interact with (users should never be a part of it). Names without the leading _ like wheel are often used for groups which users might want to be a part of. If we agree on this, then the pipewire group shouldn't have a leading _ in its name.