chore(deps): update actions/download-artifact action to v8 #7056

Performance Gate Passed

✅ 1009 untouched benchmarks
⏩ 1515 skipped benchmarks¹

_{Comparing renovate/major-8-github-artifact-actions (f102a63) with develop (2d37a46)}

1515 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩