Updated libpng to 1.6.45 #482

Job	Run time
aarch64 pp310 manylinux2014	2h 22m 0s
aarch64 pp310 manylinux_2_28	2h 34m 23s
sdist	19s
aarch64 cp3{9,10,11} manylinux2014	2h 9m 54s
aarch64 cp3{9,10,11} manylinux_2_28	2h 23m 23s
aarch64 cp3{9,10,11} musllinux	2h 15m 15s
macOS 10.10 x86_64	21m 3s
Windows x86	21m 51s
aarch64 cp3{12,13} manylinux2014	1h 55m 18s
macOS 10.13 x86_64	24m 4s
Windows AMD64	28m 57s
aarch64 cp3{12,13} manylinux_2_28	2h 3m 8s
macOS 10.15 x86_64	16m 25s
Windows ARM64	9m 41s
aarch64 cp3{12,13} musllinux	1h 56m 31s
macOS arm64	20m 57s
manylinux2014 and musllinux x86_64	39m 41s
manylinux_2_28 x86_64	18m 39s
Upload wheels to scientific-python-nightly-wheels	0s
Upload release to PyPI	0s
	21h 1m 29s

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