chore: Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/node.js.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Use Node.js
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
         node-version: 'lts/*'
     - run: npm ci