feat: do not hardcode pnpm version in CI

Author: Ayush Jha

.github/workflows/ci.yaml

@@ -17,7 +17,6 @@ jobs:
       - uses: pnpm/action-setup@v4
         name: Install pnpm
         with:
-          version: 9
           run_install: false
 
       - name: Install Node.js