ci: fix pnpm

Author: monkeyWie

.github/workflows/ci.yaml

@@ -12,9 +12,10 @@ jobs:
   CI:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Install PNPM
-        run: npm install --global pnpm && pnpm setup
+      - uses: actions/checkout@v4
+      - uses: pnpm/action-setup@v3
+        with:
+          version: 9
       - name: Install Vercel CLI
         run: pnpm install --global vercel@canary
       - name: Pull Vercel Environment Information