chore: Update deploy workflow to include pull requests (#68)

Author: k-miyake

.github/workflows/deploy.yml

@@ -2,6 +2,8 @@ name: Deploy to Cloudflare with NuxtHub Cli
 on:
   push:
     branches: [main]
+  pull_request:
+    branches: [main]
 jobs:
   build-and-deploy:
     runs-on: ubuntu-latest