Bump actions/checkout from 4 to 5 #76

Job	Run time
test (ubuntu-latest, 26.3, false)	59s
test (ubuntu-latest, 27.2, false)	35s
test (ubuntu-latest, 29.4, false)	47s
test (windows-latest, 27.2, false)	35m 1s
test (macos-latest, 29.4, false)	2m 27s
test (windows-latest, 28.2, false)	50m 4s
test (ubuntu-latest, 30.1, false)	36s
test (windows-latest, 26.3, false)	1h 25m 10s
test (macos-latest, snapshot, true)	2m 52s
test (windows-latest, 29.4, false)	27m 7s
test (windows-latest, snapshot, true)	34m 45s
test (windows-latest, 30.1, false)	1h 25m 10s
test (macos-latest, 28.2, false)	2m 44s
test (ubuntu-latest, snapshot, true)	38s
test (ubuntu-latest, 28.2, false)	35s
test (macos-latest, 30.1, false)	2m 45s
	5h 32m 15s

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