ci: bump actions/upload-artifact from 4 to 7 #54

Job	Run time
Architecture and Documentation Guards	39s
Weekly Benchmark Diff	0s
Build and run tests (JDK 21)	50s
Build and run tests (JDK 17)	1m 15s
Performance Smoke Check	53s
Build and run tests (JDK 25)	55s
Examples Generation Smoke Test	49s
	5m 21s

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