Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/foundry-npm.yml

@@ -7,7 +7,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@v4
-            - uses: actions/setup-node@v4
+            - uses: actions/setup-node@v6
               with:
                   node-version: 16
             - name: Install Foundry