build(deps): bump actions/setup-node from 4 to 6

dependabot[bot]

24.37.2026 5cd6fa04596adc7d6f1291de098d06b182d9e8b0

 .github/workflows/quickstart.yml

@@ -24,7 +24,7 @@
          submodules: false

      - name: Set up Node.js
        uses: actions/setup-node@v4
        uses: actions/setup-node@v6
        with:
          node-version: "24"