Update actions/setup-node action to v6 (#103)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Checkout 🛎
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       - name: Setup Node env 🏗
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: "lts/*"
           cache: "npm"