gdk-pixbuf2: update to 2.44.6

Since gdk-pixbuf2-devel built fine up to Snow Leopard:
https://github.com/macports/macports-ports/pull/32053

Also, sync the Portfile with gdk-pixbuf2-devel

graphics/gdk-pixbuf2/Portfile

@@ -15,22 +15,21 @@ set my_name         gdk-pixbuf2
 # GNOME project name
 set gname           gdk-pixbuf
 
-version             2.42.12
+version             2.44.6
 revision            0
 epoch               2
 
-checksums           rmd160  596f4d9f9dba4c1273f4ec90e77bc0431095c15a \
-                    sha256  b9505b3445b9a7e48ced34760c3bcb73e966df3ac94c95a148cb669ab748e3c7 \
-                    size    6525072
+checksums           rmd160  54aed82894fc4b0e506b8597605d52a8f79a12a2 \
+                    sha256  140c2d0b899fcf853ee92b26373c9dc228dbcde0820a4246693f4328a27466fa \
+                    size    6033428
 
 categories          graphics
-platforms           darwin
 license             LGPL
 maintainers         {mascguy @mascguy} openmaintainer
 
 description         The gdk-pixbuf-2.0 library
 long_description    ${description}
-homepage            http://www.gtk.org/
+homepage            https://www.gtk.org/
 
 set branch          [join [lrange [split ${version} .] 0 1] .]
 master_sites        gnome:sources/${gname}/${branch}/
@@ -41,18 +40,17 @@ use_xz              yes
 # Disable unexpected download of subprojects
 meson.wrap_mode     nodownload
 
-set python_branch   3.12
+set python_branch   3.14
 set python_version  [string map {. {}} ${python_branch}]
 
 depends_build-append \
                     port:gi-docgen \
                     port:gtk-doc \
                     port:libxslt \
-                    port:pkgconfig \
+                    path:bin/pkg-config:pkgconfig \
                     port:py${python_version}-docutils
 
-depends_lib-append \
-                    path:lib/pkgconfig/glib-2.0.pc:glib2 \
+depends_lib-append  path:lib/pkgconfig/glib-2.0.pc:glib2 \
                     path:lib/pkgconfig/gobject-introspection-1.0.pc:gobject-introspection \
                     port:shared-mime-info \
                     port:libpng \