Add actions/setup-node step

Author: aibaars

.github/workflows/update-bundle.yml

@@ -36,6 +36,12 @@ jobs:
           git config --global user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --global user.name "github-actions[bot]"
 
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
       - name: Install dependencies
         run: npm ci