ci: Update Xcode version in release #737

Job	Run time
windows	2m 19s
test (platform=iOS\ Simulator,OS=18.2,name=iPhone\ 16\ Pro\ Max, test)	5m 7s
linux	2m 22s
test (platform\=tvOS\ Simulator,OS=18.2,name\=Apple\ TV, test)	4m 18s
spm-test	3m 55s
test (platform=watchOS\ Simulator,name=Apple\ Watch\ Series\ 10\ \(42mm\), build)	1m 16s
test (platform=macOS, test)	4m 41s
test (platform=visionOS\ Simulator,OS=2.2,name=Apple\ Vision\ Pro, build)	1m 16s
docs	1m 27s
cocoapods	6m 36s
xcode-test-5_7	1m 55s
	35m 12s

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