Bump actions/setup-node from 4 to 6 (#2661)

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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/release.yml

@@ -108,7 +108,7 @@ jobs:
         with:
           token: ${{ secrets.GH_TOKEN }}
       # Set up .npmrc file to publish to npm
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 'lts/*'
           check-latest: true
@@ -141,7 +141,7 @@ jobs:
         with:
           token: ${{ secrets.GH_TOKEN }}
       # Set up .npmrc file to publish to npm
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: 'lts/*'
           check-latest: true

.github/workflows/test.yml

@@ -356,7 +356,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with: {node-version: 'lts/*'}
       - uses: ./.github/util/initialize
         with: {github-token: "${{ github.token }}"}
@@ -380,7 +380,7 @@ jobs:
   #
   #   steps:
   #     - uses: actions/checkout@v5
-  #     - uses: actions/setup-node@v5
+  #     - uses: actions/setup-node@v6
   #       with: {node-version: 'lts/*'}
   #     - run: npm install
   #       working-directory: pkg/sass-parser/