Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Checkout 🛎
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Setup Node env 🏗
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
       - name: Cache node_modules 📦
         uses: actions/cache@v4
         with: