chore(deps): update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/pkg.pr.new.yml

@@ -10,7 +10,7 @@ jobs:
         uses: actions/checkout@v6
 
       - run: corepack enable
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 20