Bump actions/checkout from 3.6.0 to 4.1.6 (#821) #465

Job	Run time
Python 3.6 on macos-13	3m 5s
Linux docs	1m 12s
Python 3.12 on macos-13	3m 40s
Python 3.6 on Windows x86	3m 13s
Linux meta	1m 9s
Python 3.12 (minimal build) on macos-13	4m 6s
Python 3.7 on Windows x86	3m 3s
Linux mypy	1m 4s
Python 3.12 on macos-latest	1m 37s
Python 3.8 on Windows x86	3m 14s
Linux pypy3	2m 46s
Python 3.12 (minimal build) on macos-latest	2m 14s
Python 3.9 on Windows x86	3m 10s
Linux pypy3	3m 1s
Python 3.10 on Windows x86	2m 36s
Linux py36	1m 54s
Python 3.11 on Windows x86	2m 51s
Linux py37	1m 42s
Python 3.12 on Windows x86	3m 2s
Linux py38	1m 44s
Python 3.6 on Windows x64	2m 24s
Linux py39	1m 51s
Python 3.7 on Windows x64	2m 18s
Linux py310	1m 47s
Python 3.8 on Windows x64	2m 11s
Linux py311	1m 48s
Python 3.9 on Windows x64	1m 55s
Linux py312	1m 54s
Python 3.10 on Windows x64	2m 21s
Linux py312 system	2m 31s
Python 3.11 on Windows x64	2m 25s
Linux py312 minimal	1m 45s
Python 3.12 on Windows x64	2m 18s
	1h 17m 51s

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