fix: workflow 수정 (#32)

* main에 푸시될 때 deploy가 돌아가도록 수정했습니다.

Author: mjy926

.github/workflows/deploy-prod.yaml

@@ -2,8 +2,7 @@ name: Deploy-prod
 
 on:
   push:
-    tags:
-      - 'v[0-9]+.[0-9]+.[0-9]+*'
+    branches: [main]
 
 jobs:
   deploy: