fix: CI MySQL 데이터베이스 시간대 Asia/Seoul로 통일

Author: JoonKyoLee

src/main/resources/application-ci.yml

@@ -1,7 +1,7 @@
 spring:
   datasource:
     driver-class-name: com.mysql.cj.jdbc.Driver
-    url: jdbc:mysql://${CI_DB_HOST:localhost}:${CI_DB_PORT:3306}/${CI_DB_NAME}?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC&characterEncoding=UTF-8
+    url: jdbc:mysql://${CI_DB_HOST:localhost}:${CI_DB_PORT:3306}/${CI_DB_NAME}?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Seoul&sessionVariables=time_zone='%2B09:00'&characterEncoding=UTF-8
     username: ${CI_DB_USER}
     password: ${CI_DB_PASSWORD}