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Bump actions/upload-artifact from 5.0.0 to 6.0.0 #769

Job	Run time
build_linux (3.10)	3m 19s
build_linux (3.11)	2m 53s
build_linux (3.13)	2m 46s
build_linux (3.12)	2m 58s
build_windows (3.11)	9m 26s
build_windows (3.13)	6m 54s
build_windows (3.12)	8m 40s
build_windows (3.10)	8m 22s
test_linux (3.11, false, ubuntu-latest)	1m 36s
test_linux (3.12, false, ubuntu-latest)	1m 42s
test_linux (3.10, false, ubuntu-latest)	1m 27s
test_linux (3.13, false, ubuntu-latest)	1m 31s
test_windows (3.10, false, windows-latest)	2m 57s
test_windows (3.12, false, windows-latest)	4m 4s
test_windows (3.13, false, windows-latest)	3m 51s
test_windows (3.11, false, windows-latest)	2m 57s
	1h 5m 23s