Bump Python 3 to 3.12 #4141

Job	Run time
Build wheel and source distribution	28s
aarch64-unknown-linux-gnu (ubuntu-22.04)	3m 48s
x86_64-unknown-linux-gnu (ubuntu-22.04)	3m 22s
x86_64-unknown-linux-musl (ubuntu-22.04)	3m 47s
powerpc64le-unknown-linux-gnu (ubuntu-22.04)	3m 49s
x86_64-pc-windows-msvc (windows-2022)	6m 16s
i686-pc-windows-msvc (windows-2022)	7m 14s
aarch64-apple-darwin (macos-12)	6m 32s
x86_64-apple-darwin (macos-12)	10m 5s
Build macOS installer and sign/notarize artifacts	1m 5s
Build Windows installers	1m 10s
Publish release	0s
	47m 36s

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