Increase version to 12.3 #185

Job	Run time
linux_gcc_valgrind	1m 15s
linux_gcc (ubuntu-latest, Debug)	5m 7s
linux_gcc_sanitizers	2m 23s
linux_clang (ubuntu-latest, Debug)	3m 23s
linux_gcc (ubuntu-latest, Release)	2m 43s
linux_clang (ubuntu-latest, Release)	1m 21s
macos_clang (macos-latest, Debug)	5m 58s
macos_clang (macos-latest, Release)	1m 31s
windows_mingw64 (windows-latest, Debug)	5m 14s
windows_msvc2022	1m 45s
windows_mingw64 (windows-latest, Release)	2m 47s
	33m 27s

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