Fix CI pnpm version conflict

Remove explicit version from pnpm/action-setup so it reads the version
from packageManager in package.json instead.

Author: wangdicoder

.github/workflows/ci.yml

@@ -17,8 +17,6 @@ jobs:
       - uses: actions/checkout@v4
 
       - uses: pnpm/action-setup@v4
-        with:
-          version: 9
 
       - uses: actions/setup-node@v4
         with: