Update zlib tar source

Author: ax3l

library_builders.sh

@@ -243,7 +243,7 @@ function build_zlib {
 
     ZLIB_VERSION="1.3.1"
 
-    curl -sLO https://zlib.net/fossils/zlib-$ZLIB_VERSION.tar.gz
+    curl -sLO https://github.com/madler/zlib/archive/refs/tags/v${ZLIB_VERSION}.tar.gz
     file zlib*.tar.gz
     tar xzf zlib-$ZLIB_VERSION.tar.gz
     rm zlib*.tar.gz