🐛 fix: enum 스펠링

Author: catturtle123

src/main/java/org/withtime/be/withtimebe/domain/date/entity/enums/DateTime.java

@@ -2,14 +2,12 @@
 
 import lombok.AllArgsConstructor;
 import lombok.Getter;
-import org.withtime.be.withtimebe.global.error.code.DateCourseErrorCode;
-import org.withtime.be.withtimebe.global.error.exception.DateCourseException;
 
 @Getter
 @AllArgsConstructor
 public enum DateTime {
     ONETOTWO(2),
-    THREETOFROUR(3),
+    THREETOFOUR(3),
     HALFDAY(4),
     ALLDAY(5);