ci: Bump actions artifacts from 3 to 4 #6374

Job	Run time
Sample macOS-Swift	3m 18s
Release Build of iOS Swift	3m 43s
Sample iOS13-Swift	2m 38s
Sample watchOS	3m 32s
Build XCFramework	12m 26s
Validate Swift Package Manager	1m 19s
Validate Swift Package Manager Dynamic	1m 6s
Build with Swift	59s
Check no UIKit linkage (Debug_without_UIKit)	2m 0s
Check UIKit linkage (Debug)	1m 56s
Check no UIKit linkage (Release_without_UIKit)	2m 18s
Check UIKit linkage (Release)	2m 39s
Validate XCFramework	1m 33s
	39m 27s

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