ci: ensure pnpm installed before setup-node

Author: simonguo

.github/workflows/ci.yml

@@ -13,19 +13,19 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
+      - name: Set up pnpm
+        uses: pnpm/action-setup@v3
+        with:
+          version: 8
 
       - name: Set up Node.js
         uses: actions/setup-node@v4
         with:
           node-version: '20'
           cache: 'pnpm'
 
-      - name: Set up pnpm
-        uses: pnpm/action-setup@v3
-        with:
-          version: 8
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
       - name: Install dependencies
         run: pnpm install