Update coursier to 2.1.9 (#1642) #2043

Job	Run time
conformance	1m 34s
build (2_12, mima)	1m 13s
build (2_12, e2e)	7s
build (2_12, test)	8m 18s
build (2_13, mima)	1m 5s
build (2_13, e2e)	5s
build (2_13, test)	9m 14s
build (3, mima)	4s
build (3, e2e)	4s
build (3, test)	8m 23s
build (2_12, examples_and_formatting)	2m 49s
build (2_13, scala3_compat_test)	7m 4s
build (3, scala3_compat_test)	9m 33s
ci-passed	1s
	49m 34s

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