fix ci workflow

Author: c5n8

.github/workflows/ci.yml

@@ -17,10 +17,15 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
           node-version: '20'
+          registry-url: 'https://registry.npmjs.org'
+          cache: 'pnpm'
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile