fix(cd): 배포 브랜치를 main으로 변경

Author: sungchaewon

.github/workflows/cd.yml

@@ -4,7 +4,7 @@ name: CD
 
 on:
   push:
-    branches: [ "develop" ]
+    branches: [ "main" ]
 
 env:
   AWS_REGION: ap-northeast-2