Updated libpng to 1.6.48 (#8940)

Author: hugovk

.github/workflows/wheels-dependencies.sh

@@ -39,7 +39,7 @@ ARCHIVE_SDIR=pillow-depends-main
 # Package versions for fresh source builds
 FREETYPE_VERSION=2.13.3
 HARFBUZZ_VERSION=11.2.1
-LIBPNG_VERSION=1.6.47
+LIBPNG_VERSION=1.6.48
 JPEGTURBO_VERSION=3.1.0
 OPENJPEG_VERSION=2.5.3
 XZ_VERSION=5.8.1

winbuild/build_prepare.py

@@ -118,7 +118,7 @@ def cmd_msbuild(
     "LCMS2": "2.17",
     "LIBAVIF": "1.3.0",
     "LIBIMAGEQUANT": "4.3.4",
-    "LIBPNG": "1.6.47",
+    "LIBPNG": "1.6.48",
     "LIBWEBP": "1.5.0",
     "OPENJPEG": "2.5.3",
     "TIFF": "4.7.0",