fix: spring boot의 버전을 spring cloud와 호환되는 버전으로 변경

Author: kikingki

build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.3.1'
+    id 'org.springframework.boot' version '3.2.7'
     id 'io.spring.dependency-management' version '1.1.5'
     id 'com.google.cloud.tools.jib' version '3.4.2'
     id 'jacoco'