Update publish.yml

Author: Janpot

.github/workflows/publish.yml

@@ -36,6 +36,9 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Set up pnpm
+        uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # v4.1.0
+
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with: