ci: rely on packageManager field for pnpm version

Author: WahyuS002

.github/workflows/ci.yml

@@ -13,8 +13,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v4
-        with:
-          version: 9
 
       - uses: actions/setup-node@v4
         with: