New review comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/23296#discussion_r517524631

Comment:
Please don't. Using variables (besides of $version, that is necessity) in url makes it harder to copy from template and use, and leaks to other data sets (search for $ in https://alpha.de.repo.voidlinux.org/void-updates/void-updates.txt ).
Also $pkgname is best when used as *package name*, ie. where it would be still used, if preferred pkgname was taken/forbidden.