New review comment by abenson on void-packages repository

https://github.com/void-linux/void-packages/pull/29783#discussion_r605084107

Comment:
That git hash is going to change with every update.  The link could be replaced with `https://gitlab.inria.fr/gf2x/gf2x/-/archive/gf2x-${version}/gf2x-gf2x-${version}.tar.gz` or even `${homepage}/-/archive/gf2x-${version}/gf2x-gf2x-${version}.tar.gz`