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

Author: renovate[bot]

.github/workflows/push.yml

@@ -93,7 +93,7 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 20
       - name: Install dependencies