chore(deps): update actions/upload-artifact to v4 #838

Job	Run time
flutter-test-analyze / Analyze	1m 2s
flutter-test-analyze / Test	1m 10s
flutter-test-analyze / Format	35s
flutter-build / iOS	6s
flutter-build / Android (apk)	7m 19s
flutter-build / WEB	6s
	10m 18s

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