chore(deps): update actions/download-artifact to v4.1.5 #9

Job	Run time
page / deploy	11s
flutter-test-analyze / Analyze	1m 0s
flutter-test-analyze / Format	39s
flutter-test-analyze / Test	1m 11s
flutter-build / WEB	6s
flutter-build / iOS	7s
flutter-build / Android (aab)	6m 1s
fastlane-dry-run / Play Store	2m 24s
	11m 39s

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