Update actions/setup-node action to v6

Author: renovate[bot]

.github/workflows/playwright.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/setup-node@v5
+    - uses: actions/setup-node@v6
       with:
         node-version: 22
     - name: Install pnpm