CI: Set package manager.

Author: vikpe

.github/workflows/deploy.yml

@@ -20,6 +20,9 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install, build
         uses: withastro/action@v4
+        with:
+          package-manager: pnpm@latest
+
 
   deploy:
     timeout-minutes: 2