New comment by michaelmrose on void-packages repository

https://github.com/void-linux/void-packages/pull/28785#issuecomment-1015139243

Comment:
@lane-brain curl https://downloads.sourceforge.net/sourceforge/isl-0.21.tar.gz = 404 

Looks like it ought to be https://sourceforge.net/projects/libisl/files/isl-0.21.tar.bz2