Bump actions/download-artifact from 5 to 6 (#204) #630

Job	Run time
Build distribution packages	17s
Test with nox (amd64, ubuntu-24.04, 3.12, pytest_min)	1m 6s
Test with nox (arm, ubuntu-24.04, 3.11, ci_checks_max)	1m 44s
Test with nox (amd64, ubuntu-24.04, 3.12, ci_checks_max)	1m 37s
Test with nox (amd64, ubuntu-24.04, 3.11, ci_checks_max)	1m 29s
Test with nox (amd64, ubuntu-24.04, 3.11, pytest_min)	1m 5s
Test with nox (arm, ubuntu-24.04, 3.11, pytest_min)	1m 17s
Test with nox (arm, ubuntu-24.04, 3.12, ci_checks_max)	1m 37s
Test with nox (arm, ubuntu-24.04, 3.12, pytest_min)	1m 18s
Test documentation website generation	-10s
Test package installation (arm, ubuntu-24.04, 3.11)	27s
Test package installation (amd64, ubuntu-24.04, 3.12)	18s
Test package installation (amd64, ubuntu-24.04, 3.11)	17s
Test package installation (arm, ubuntu-24.04, 3.12)	28s
Test package installation	4s
Test with nox	3s
Publish documentation website to GitHub pages	29s
Create GitHub release	5s
Publish packages to PyPI	19s
	13m 50s

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