update order of steps in nightly github action (#793)

.github/workflows/nightly.yml

@@ -17,10 +17,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
+      - name: Checkout code
         uses: actions/checkout@v4
+      
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: latest
 
-      # Node + pnpm (with built-in cache)
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
@@ -28,12 +32,7 @@ jobs:
           cache: pnpm
           cache-dependency-path: '**/pnpm-lock.yaml'
 
-      - name: Setup pnpm
-        uses: pnpm/action-setup@v4
-        with:
-          version: latest
-
-      - name: Install deps (root)
+      - name: Install dependencies (root)
         run: pnpm install --frozen-lockfile
 
       - name: Run tests