Update mill-main to 0.11.12 #1569

Job	Run time
bincompat	31s
integration-tests (ubuntu-22.04)	1m 40s
examples (ubuntu-latest)	39s
integration-tests (macos-12)	2m 1s
format	11s
examples (windows-latest)	1m 15s
integration-tests (windows-latest)	3m 5s
publishLocal	35s
test (ubuntu-latest, 8, 2.12.18)	27s
website	37s
test (ubuntu-latest, 8, 2.12.19)	25s
test (ubuntu-latest, 8, 2.13.13)	23s
test (ubuntu-latest, 8, 2.13.14)	28s
test (ubuntu-latest, 8, 3.3.3)	24s
test (ubuntu-latest, 8, 3.4.2)	23s
test (windows-latest, 8, 2.13.14)	39s
test (macos-12, 8, 2.13.14)	40s
test (ubuntu-latest, 17, 2.13.14)	32s
all-tests	0s
	14m 55s

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