setup pnpm on action

Author: devkiran

.github/workflows/main.yaml

@@ -17,6 +17,11 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v4
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v3
+        with:
+          version: 8
+
       - name: Install dependencies
         run: pnpm install