chore: use pnpm 9 in ci

Author: bluwy

.github/workflows/ci.yml

@@ -13,9 +13,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Install pnpm
-        uses: pnpm/action-setup@v2
-        with:
-          version: 8
+        uses: pnpm/action-setup@v4
 
       - name: Set node version to 16
         uses: actions/setup-node@v4