Fix libpng release-monitor ID

Author: DarthSim

check-versions.sh

@@ -52,7 +52,7 @@ check_version "LIBEXIF" $LIBEXIF_VERSION "1607"
 check_version "LCMS2" $LCMS2_VERSION "9815"
 check_version "LIBJPEGTURBO" $LIBJPEGTURBO_VERSION "1648"
 check_version "LIBJXL" $LIBJXL_VERSION "232764"
-check_version "LIBPNG" $LIBPNG_VERSION "15294"
+check_version "LIBPNG" $LIBPNG_VERSION "1705"
 check_version "LIBSPNG" $LIBSPNG_VERSION "24289"
 check_version "LIBWEBP" $LIBWEBP_VERSION "1761"
 check_version "LIBTIFF" $LIBTIFF_VERSION "1738"