Bump actions/checkout from 2 to 5 #1904

Job	Run time
Docker CLI tests (ubuntu-latest)	5m 39s
Tests (ubuntu-latest, 8)	16m 42s
Tests (ubuntu-latest, 17)	11m 29s
Tests (ubuntu-latest, 11)	16m 47s
bazel_aspect	2m 56s
bazel	1m 25s
Tests (ubuntu-latest, 21)	7m 39s
Maven tests (11)	2m 25s
Maven tests (17)	2m 30s
Maven tests (8)	2m 37s
Maven tests (21)	2m 21s
check	4m 54s
	1h 17m 24s

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