Bump setup-node version

Author: lolleko

.github/workflows/auto-update.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           token: ${{ secrets.UPDATE_PAT }}
       - name: Setup Node.js environment
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: "12"
       - name: npm update