deps(actions): Bump actions/setup-node from 4 to 6 in the actions group

Bumps the actions group with 1 update: [actions/setup-node](https://github.com/actions/setup-node).


Updates `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
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci-tests.yml

@@ -183,7 +183,7 @@ jobs:
 
     - name: Set up Node.js
       if: steps.check.outputs.should_test == 'true'
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: '20'
         cache: 'yarn'