Bump actions/setup-node from 4 to 6

Bumps [actions/setup-node](https://github.com/actions/setup-node) from 4 to 6.
- [Release notes](https://github.com/actions/setup-node/releases)
- [Commits](actions/setup-node@v4...v6)

---
updated-dependencies:
- dependency-name: actions/setup-node
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/tests.yaml

@@ -13,7 +13,7 @@ jobs:
                 - 23.x
         steps:
         - uses: actions/checkout@v4
-        - uses: actions/setup-node@v4
+        - uses: actions/setup-node@v6
           with:
               node-version: ${{ matrix.node-version }}
         - run: npm install-test