Dotty

[chore] Set reference version to 3.7.1 #35819

Job	Run time
test_non_bootstrapped	30m 43s
test	1h 6m 55s
test_windows_fast	53m 40s
test_scala2_library_tasty	0s
MiMa	11m 14s
test_windows_full	0s
community_build_a	56m 1s
community_build_b	1h 18m 50s
test_sbt	19m 42s
community_build_c	1h 0m 50s
build-msi-package	0s
test_java8	0s
build-sdk-package / build	9m 0s
test-msi-package	0s
build-chocolatey-package / build	17s
test-chocolatey-package	0s
publish_nightly	0s
publish_release	0s
nightly_documentation	0s
open_issue_on_failure	0s
	6h 27m 12s

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