[Chore] prod 환경의 JPA ddl-auto 옵션을 none → update로 변경

Author: soonge2

src/main/resources/application-prod.yaml

@@ -1,7 +1,7 @@
 spring:
   jpa:
     hibernate:
-      ddl-auto: none
+      ddl-auto: update
 
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver