Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/validate-renovate.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v5.0.0
-      - uses: actions/setup-node@v5.0.0
+      - uses: actions/setup-node@v6.0.0
 
       - name: install
         run: |