chore(deps): update actions/download-artifact action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/download-artifact	action	major	v5 -> v6

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Release Notes

actions/download-artifact (actions/download-artifact)

v6

Compare Source

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Configuration

📅 Schedule: Branch creation - Between 12:00 AM and 03:59 AM, only on Monday ( * 0-3 * * 1 ) (UTC), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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[coveralls]

coverage: 72.613% (-0.3%) from 72.935%
when pulling 3035e39 on renovate/major-6-all-github-action
into 324649d on master.