Update actions/upload-artifact and actions/download-artifact actions to v4 #11

Job	Run time
Build QMapLibre for Android (Qt6.5.3, x86)	2m 15s
Build QMapLibre for Android (Qt6.5.3, x86_64)	2m 58s
Build QMapLibre for Android (Qt6.5.3, armeabi-v7a)	2m 22s
Build QMapLibre for Android (Qt6.5.3, arm64-v8a)	2m 57s
Build QMapLibre for Android (Qt6.6.0, x86)	2m 21s
Build QMapLibre for Android (Qt6.6.0, x86_64)	2m 27s
Build QMapLibre for Android (Qt6.6.0, armeabi-v7a)	2m 14s
Build QMapLibre for Android (Qt6.6.0, arm64-v8a)	2m 28s
Combine QMapLibre (6.5.3)	1m 15s
Combine QMapLibre (6.6.0)	1m 23s
Release QMapLibre	0s
	22m 40s

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