Updated libpng to 1.6.50 (#9058)

Author: radarhere

.github/workflows/wheels-dependencies.sh

@@ -95,7 +95,7 @@ ARCHIVE_SDIR=pillow-depends-main
 # you change those versions, ensure the patch is also updated.
 FREETYPE_VERSION=2.13.3
 HARFBUZZ_VERSION=11.2.1
-LIBPNG_VERSION=1.6.49
+LIBPNG_VERSION=1.6.50
 JPEGTURBO_VERSION=3.1.1
 OPENJPEG_VERSION=2.5.3
 XZ_VERSION=5.8.1

winbuild/build_prepare.py

@@ -121,7 +121,7 @@ def cmd_msbuild(
     "LCMS2": "2.17",
     "LIBAVIF": "1.3.0",
     "LIBIMAGEQUANT": "4.3.4",
-    "LIBPNG": "1.6.49",
+    "LIBPNG": "1.6.50",
     "LIBWEBP": "1.6.0",
     "OPENJPEG": "2.5.3",
     "TIFF": "4.7.0",