chore(deps): bump the gha group across 1 directory with 2 updates

Bumps the gha group with 2 updates in the /.github/workflows directory: [actions/checkout](https://github.com/actions/checkout) and [volta-cli/action](https://github.com/volta-cli/action).


Updates `actions/checkout` from 4.1.1 to 6.0.2
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4.1.1...v6.0.2)

Updates `volta-cli/action` from 4 to 5
- [Release notes](https://github.com/volta-cli/action/releases)
- [Changelog](https://github.com/volta-cli/action/blob/master/CHANGELOG.md)
- [Commits](volta-cli/action@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gha
- dependency-name: volta-cli/action
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: gha
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -21,9 +21,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4.1.1
+        uses: actions/checkout@v6.0.2
       - name: Use Node version defined in manifest
-        uses: volta-cli/action@v4
+        uses: volta-cli/action@v5
       - name: Install Node dependencies
         run: npm ci
       - name: Run Node tests