libpng: Update to 1.6.47 (#23462)

mingw-w64-libpng/PKGBUILD

@@ -3,7 +3,7 @@
 _realname=libpng
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=1.6.46
+pkgver=1.6.47
 pkgrel=1
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clangarm64')
@@ -19,9 +19,9 @@ msys2_references=(
   "cpe: cpe:/a:libpng:libpng"
 )
 source=("https://downloads.sourceforge.net/sourceforge/libpng/${_realname}-${pkgver}.tar.xz"
-        "https://downloads.sourceforge.net/project/libpng-apng/libpng16/${pkgver}/${_realname}-${pkgver}-apng.patch.gz")
-sha256sums=('f3aa8b7003998ab92a4e9906c18d19853e999f9d3bca9bd1668f54fa81707cb1'
-            '29bec2dfd046ef51d52f3e5320f91faffc96be07b41d9cb9d43d9df557a0d303')
+        "libpng-${pkgver}-apng.patch::https://raw.githubusercontent.com/mozilla/gecko-dev/3f2c4cf90aa8c839a7d346022c6a77ad3713d486/media/libpng/apng.patch")
+sha256sums=('b213cb381fbb1175327bd708a77aab708a05adde7b471bc267bd15ac99893631'
+            '4ebab105c07e819ad41101eb7a02d680d180b2534e04504ff4a583e02eb5da52')
 validpgpkeys=('8048643BA2C840F4F92A195FF54984BFA16C640F')  # Glenn Randers-Pehrson (mozilla) <glennrp+bmo@gmail.com>
 
 prepare() {