[FIX] Springboot 버전 3.2.2로 변경

- NotNull 버그 해결

build.gradle

@@ -1,6 +1,6 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.2.0'
+    id 'org.springframework.boot' version '3.2.2'
     id 'io.spring.dependency-management' version '1.1.4'
 }
 
@@ -25,6 +25,7 @@ dependencies {
     // spring boot
     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
     implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-validation'
 
     // lombok
     compileOnly 'org.projectlombok:lombok'