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Update `actions/checkout` (#280) #1177

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Job	Run time
Lint	2m 14s
Update README	1m 58s
Test (8)	1m 27s
Test (11)	1m 34s
Test (17)	2m 31s
Build	3m 46s
ci	1s
Release	2m 1s
Release Docs	0s
Notify Docs Release	0s
	15m 32s