Use 3.9.0 instead of 3.8.10 #269

Job	Run time
validate_spec	1m 8s
validate_spec	1m 8s
build_xcode14 (14.1, name=iPad Pro (12.9-inch) (5th generation),OS=16.1)	20m 39s
build_xcode14 (14.1, name=iPad Pro (12.9-inch) (5th generation),OS=16.1)	23m 56s
build (13.0, name=iPhone SE (2nd generation),OS=15.0)	28m 11s
build (13.0, name=iPhone SE (2nd generation),OS=15.0)	28m 11s
build_xcode14 (14.1, name=iPhone SE (2nd generation),OS=16.1)	20m 57s
build_xcode14 (14.1, name=iPhone SE (2nd generation),OS=16.1)	25m 45s
build (13.0, name=iPad Pro (12.9-inch) (5th generation),OS=15.0)	30m 4s
build (13.0, name=iPad Pro (12.9-inch) (5th generation),OS=15.0)	30m 4s
	3h 30m 3s

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