ci: update pnpm/action-setup

Author: moltinginstar

.github/workflows/ci.yaml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Set up pnpm
-        uses: pnpm/action-setup@v3
+        uses: pnpm/action-setup@v4
 
       - name: Set up Node.js
         uses: actions/setup-node@v4