Bump actions/checkout from 3 to 4 #3821

Job	Run time
build	4m 41s
test_when_cache_missing	0s
test_when_cache_present (0, 8, 720)	23m 26s
test_when_cache_present (1, 8, 720)	27m 39s
test_when_cache_present (2, 8, 720)	23m 44s
test_when_cache_present (3, 8, 720)	23m 5s
test_when_cache_present (4, 8, 720)	23m 49s
test_when_cache_present (5, 8, 720)	22m 49s
test_when_cache_present (6, 8, 720)	24m 58s
test_when_cache_present (7, 8, 720)	26m 0s
test_when_cache_present (8, 8, 720)	11m 18s
save_test_times_when_cache_missing	0s
save_test_times_when_cache_present	5s
	3h 31m 34s

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