tests

Bump actions/checkout from 4.1.1 to 4.1.6 #97

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Run time

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Job	Run time
Linting	52s
Ubuntu / 3.9	38s
Ubuntu / 3.10	38s
Ubuntu / 3.11	38s
Ubuntu / 3.12	54s
MacOS / 3.9	25s
MacOS / 3.10	27s
MacOS / 3.11	35s
MacOS / 3.12	26s
Windows / 3.9	1m 42s
Windows / 3.10	1m 20s
Windows / 3.11	1m 48s
Windows / 3.12	1m 32s
coverage	24s
	12m 19s