Bump actions/checkout from 4.2.0 to 4.2.1 (#844) #534

Job	Run time
Python 3.7 on macos-13	2m 31s
Linux docs	1m 13s
Python 3.13-dev on macos-13	5m 5s
Python 3.7 on Windows x86	2m 36s
Linux meta	1m 23s
Python 3.8 on Windows x86	1m 56s
Python 3.13-dev (minimal build) on macos-13	4m 15s
Python 3.9 on Windows x86	2m 38s
Linux mypy	1m 2s
Python 3.13-dev on macos-latest	1m 58s
Python 3.10 on Windows x86	2m 42s
Linux pypy3	2m 44s
Python 3.13-dev (minimal build) on macos-latest	1m 45s
Python 3.11 on Windows x86	2m 55s
Linux pypy3	2m 43s
Python 3.12 on Windows x86	2m 56s
Linux py37	1m 48s
Python 3.13-dev on Windows x86	3m 28s
Linux py38	1m 45s
Python 3.7 on Windows x64	2m 16s
Linux py39	1m 50s
Python 3.8 on Windows x64	1m 54s
Linux py310	1m 45s
Python 3.9 on Windows x64	2m 10s
Linux py311	1m 48s
Python 3.10 on Windows x64	2m 9s
Linux py312	1m 51s
Python 3.11 on Windows x64	2m 18s
Linux py313	1m 54s
Python 3.12 on Windows x64	2m 29s
Linux py313 system	2m 39s
Python 3.13-dev on Windows x64	2m 58s
Linux py313 minimal	1m 55s
	1h 17m 19s

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