chore(deps): update actions/setup-node action to v6 (#1368)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [actions/setup-node](https://redirect.github.com/actions/setup-node) |
action | major | `v5` -> `v6` | [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/actions/setup-node/badge)](https://securityscorecards.dev/viewer/?uri=github.com/actions/setup-node)
|

---

### Release Notes

<details>
<summary>actions/setup-node (actions/setup-node)</summary>

###
[`v6`](https://redirect.github.com/actions/setup-node/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/setup-node/compare/v5...v6)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At 12:00 AM through 04:59 AM and 10:00
PM through 11:59 PM, Monday through Friday ( * 0-4,22-23 * * 1-5 ), Only
on Sunday and Saturday ( * * * * 0,6 ) (UTC), Automerge - At any time
(no schedule defined).

🚦 **Automerge**: Enabled.

♻ **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 this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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View the [repository job
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<!-- This is an auto-generated description by cubic. -->
---

## Summary by cubic
Updated actions/setup-node from v5 to v6 in the e2e GitHub Actions
workflow to use the latest fixes and security improvements. No behavior
changes expected; the existing configuration (node-version-file:
package.json) remains the same.

<!-- End of auto-generated description by cubic. -->

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/e2e.yml

@@ -53,7 +53,7 @@ jobs:
           bun-version-file: .bun-version
 
       - name: Install Node.js
-        uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
           node-version-file: package.json
           token: ${{ secrets.GITHUB_TOKEN }}