fix: update zlib download URL in build_zlib.sh script

- Changed the zlib download link to point to the GitHub releases page for better reliability.
- Ensured compatibility with the specified ZLIB_VERSION environment variable.

Author: scc-tw

common/build/deplib/build_zlib.sh

@@ -6,7 +6,7 @@
 set -e
 export ZLIB_VERSION=${ZLIB_VERSION:-1.3.1}
 
-wget https://www.zlib.net/fossils/zlib-${ZLIB_VERSION}.tar.gz
+wget https://github.com/madler/zlib/releases/download/v${ZLIB_VERSION}/zlib-${ZLIB_VERSION}.tar.gz
 tar -xzf zlib-${ZLIB_VERSION}.tar.gz && cd zlib-${ZLIB_VERSION}
 
 ./configure --prefix=/opt/shared_libraries