Bump actions/checkout from 3 to 4 #1740

Job	Run time
build_test_container	10m 23s
No leftovers	9m 0s
CWL conformance (v1.0, docker)	4m 11s
CWL conformance (v1.0, singularity)	3m 8s
CWL conformance (v1.0, podman)	3m 35s
CWL conformance (v1.1, docker)	4m 30s
CWL conformance (v1.1, singularity)	9m 27s
CWL conformance (v1.1, podman)	4m 58s
CWL conformance (v1.2, docker)	6m 4s
CWL conformance (v1.2, singularity)	8m 5s
CWL conformance (v1.2, podman)	7m 28s
CWL conformance (v1.2, docker, --fast-parser)	7m 46s
Test on macos-latest	9m 1s
cwltool release test	12m 58s
Tox (3, 8, lint)	40s
Tox (3, 8, unit)	8m 57s
Tox (3, 8, bandit)	35s
Tox (3, 8, mypy)	12m 57s
Tox (3, 9, lint)	50s
Tox (3, 9, unit)	10m 27s
Tox (3, 9, bandit)	43s
Tox (3, 9, mypy)	11m 7s
Tox (3, 10, lint)	32s
Tox (3, 10, unit)	11m 52s
Tox (3, 10, bandit)	47s
Tox (3, 10, mypy)	10m 30s
Tox (3, 11, lint)	46s
Tox (3, 11, unit)	11m 42s
Tox (3, 11, bandit)	38s
Tox (3, 11, mypy)	10m 31s
Tox (3, 12, lint)	56s
Tox (3, 12, unit)	11m 25s
Tox (3, 12, bandit)	44s
Tox (3, 12, mypy)	3m 22s
Linters (lintreadme)	46s
Linters (shellcheck)	15s
Linters (pydocstyle)	37s
	3h 32m 13s

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