Bump GitHub Actions CI to Xcode 16.2 #6165

Job	Run time
xcodebuild (16) (test, IOS, 16.2)	7m 46s
xcodebuild (16) (test, MACOS, 16.2)	4m 7s
xcodebuild (15) (test, IOS, 15.4)	19s
Examples	17m 57s
xcodebuild (16) (IOS, 16.2)	6m 41s
Check Macro Compatibility	3m 38s
xcodebuild (16) (MACOS, 16.2)	3m 24s
Library (evolution)	3m 49s
xcodebuild (15) (test, MAC_CATALYST, 15.4)	1s
xcodebuild (15) (test, MACOS, 15.4)	1s
xcodebuild (15) (test, TVOS, 15.4)	1s
xcodebuild (15) (test, VISIONOS, 15.4)	1s
xcodebuild (15) (test, WATCHOS, 15.4)	1s
xcodebuild (15) (IOS, 15.2)	37s
xcodebuild (15) (MACOS, 15.2)	55s
	49m 18s

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