Update location for zlib 1.2.12 as original location is no longer available.
zlib.net removed the 1.2.12 version of zlib when they released the 1.2.13 version on October 13th.
Github still keeps it around, so use that instead.
Community will be down this weekend for data migration in preparation for GitLab 17.0. Work will start at 10pm UTC (5pm CDT, 3:30am IST) and is expected to run through Sunday.
zlib.net removed the 1.2.12 version of zlib when they released the 1.2.13 version on October 13th.
Github still keeps it around, so use that instead.