Update actions/setup-node action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v4 → v6
actions/setup-node	action	major	v3 → v6

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Release Notes

actions/setup-node (actions/setup-node)

v6

Compare Source

v5

Compare Source

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

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♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

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

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• If you want to rebase/retry this PR, check this box

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[github-actions]

PR Preview Action v1.8.1
🚀 View preview at https://internetarchive.github.io/iaux-collection-browser/pr/pr-501/
Built to branch gh-pages at 2026-02-27 01:45 UTC. Preview will be ready when the GitHub Pages deployment is complete.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.43%. Comparing base (26b10a5) to head (a84ae54).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #501   +/-   ##
=======================================
  Coverage   92.43%   92.43%           
=======================================
  Files         113      113           
  Lines       18942    18942           
  Branches     1377     1377           
=======================================
  Hits        17509    17509           
  Misses       1403     1403           
  Partials       30       30           

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