build(deps): bump actions/checkout from 3 to 4 (#130) #512

Job	Run time
test (platform=iOS\ Simulator,name=iPhone\ 14\ Pro\ Max, test)	23m 23s
test (platform\=tvOS\ Simulator,name\=Apple\ TV, test)	7m 52s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 5\ \(40mm\), build)	2m 9s
test (platform=macOS, test)	7m 43s
linux	2m 51s
spm-test	5m 19s
windows	3m 57s
xcode-test-5_5	1m 31s
cocoapods	10m 49s
docs	1m 38s
	1h 7m 12s

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