Bump actions/checkout from 4 to 5 #12

Job	Run time
test (ubuntu-latest, 27.2, false)	45s
test (ubuntu-latest, 26.3, false)	25s
test (ubuntu-latest, 30.1, false)	27s
test (macos-latest, 30.1, false)	3m 1s
test (ubuntu-latest, 29.4, false)	25s
test (windows-latest, 26.3, false)	1h 49m 9s
test (ubuntu-latest, 28.2, false)	41s
test (macos-latest, 29.4, false)	2m 47s
test (macos-latest, 28.2, false)	2m 44s
test (windows-latest, 27.2, false)	1h 10m 2s
test (ubuntu-latest, snapshot, true)	24s
test (windows-latest, 28.2, false)	57m 47s
test (macos-latest, snapshot, true)	2m 23s
test (windows-latest, 30.1, false)	2h 32m 9s
test (windows-latest, 29.4, false)	2h 19m 55s
test (windows-latest, snapshot, true)	1h 6m 3s
	10h 9m 7s

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