user service 빌드 오류 수정

UserApplication.java 파일의 SpringApplication.run() 메서드 호출 시
잘못된 매개변수 수정:
- SpringApplication.run(UserApplication.java, args)
+ SpringApplication.run(UserApplication.class, args)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

user/src/main/java/com/unicorn/hgzero/user/UserApplication.java

@@ -13,6 +13,6 @@ import org.springframework.context.annotation.ComponentScan;
 public class UserApplication {
 
     public static void main(String[] args) {
-        SpringApplication.run(UserApplication.java, args);
+        SpringApplication.run(UserApplication.class, args);
     }
 }