🔧 chore : 깃 충돌 해결

Author: silver-eunjoo

backend/src/main/java/io/f1/backend/domain/game/app/GameService.java

@@ -24,6 +24,7 @@
 import io.f1.backend.global.exception.errorcode.GameErrorCode;
 import io.f1.backend.global.exception.errorcode.RoomErrorCode;
 
+import java.util.ArrayList;
 import lombok.RequiredArgsConstructor;
 
 import org.springframework.context.ApplicationEventPublisher;