chore: fix deploy gha (#137)

Author: francescarpi

.github/workflows/deploy.yml

@@ -26,6 +26,9 @@ jobs:
         with:
           node-version-file: '.nvmrc'
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+
       - name: Install dependencies
         run: pnpm install