chore: Bump ninja to 1.12 on Windows (backport #141) #654

Job	Run time
build_linux_job (Release, multithread, true)	27m 38s
build_windows_job (Release, multithread, true)	26m 44s
build_linux_job (Release, multithread, false)	28m 12s
build_windows_job (Release, multithread, false)	26m 5s
build_linux_job (Release, singlethread, true)	27m 2s
build_windows_job (Release, singlethread, true)	25m 19s
build_linux_job (Release, singlethread, false)	30m 4s
build_windows_job (Release, singlethread, false)	24m 55s
release_job	0s
	3h 35m 59s

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