Update zlib version

Signed-off-by: Min Lim <min.yeol.lim@intel.com>

Author: mlim19

scripts/prepare_machine-unknown-linux-musl.sh

@@ -35,7 +35,7 @@ apk add --no-cache musl-dev make git curl  # git & curl used by next scripts
 
 mkdir builds && cd builds
 
-ZLIB_VERSION="1.3.1"
+ZLIB_VERSION="1.3.2"
 ZLIB_FILE="zlib-$ZLIB_VERSION.tar.xz"
 curl "https://zlib.net/$ZLIB_FILE" > $ZLIB_FILE
 tar -xf "$ZLIB_FILE"