ci: Enable build of visionOS #647

Job	Run time
windows	2m 34s
spm-test	3m 57s
test (platform=iOS\ Simulator,OS=17.5,name=iPhone\ 15\ Pro\ Max, test)	7m 21s
test (platform\=tvOS\ Simulator,OS=17.5,name\=Apple\ TV, test)	6m 5s
linux	2m 21s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 9\ \(41mm\), build)	1m 18s
test (platform=macOS, test)	7m 7s
test (platform=visionOS\ Simulator,OS=1.2,name=Apple\ Vision\ Pro, test)	6m 42s
docs	1m 7s
xcode-test-5_5	1m 14s
cocoapods	7m 36s
	47m 22s

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