Bump actions/upload-artifact from 5 to 6 #1894

Job	Run time
Build (Unit-tests & Android-Lint)	4h 43m 56s
Android UI-tests on emulator (26, default)	6m 46s
Android UI-tests on emulator (34, default)	6m 30s
Android UI-tests on emulator (29, default)	7m 29s
Android UI-tests on emulator (25, default)	23m 13s
Android UI-tests on emulator (24, default)	4m 58s
Android UI-tests on emulator (33, default)	5m 55s
Android UI-tests on emulator (31, default)	6m 45s
Android UI-tests on emulator (32, default)	8m 47s
Android UI-tests on emulator (30, default)	7m 39s
Android UI-tests on emulator (35, default)	8m 5s
Android UI-tests on emulator (23, default)	7m 53s
Android UI-tests on emulator (27, default)	6m 10s
Android UI-tests on emulator (28, default)	5m 40s
Android UI-tests on emulator (36, default)	41s
	6h 30m 27s

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