Dotty

Change Nightly version date to be the current date in UTC #37011

Job	Run time
test	1h 8m 15s
community_build_a	48m 43s
community_build_c	58m 14s
MiMa	9m 18s
test_sbt	15m 19s
test_windows_fast	33m 49s
test_non_bootstrapped	0s
community_build_b	1h 22m 57s
test_windows_full	0s
build-msi-package	0s
test_java8	0s
test-msi-package	0s
build-sdk-package / build	8m 42s
test_scala2_library_tasty	-7s
build-chocolatey-package / build	29s
test-chocolatey-package	0s
publish_release	0s
	5h 25m 39s

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