Merge pull request #7 from LikeLion-KNU/HOTFIX

[MODIFY] increase length of url_list

src/main/java/LlikelionKNU/KNUfest/domain/booth/entity/BoothEntity.java

@@ -45,6 +45,6 @@ public class BoothEntity extends BasicEntity {
             name = "URL_LIST",
             joinColumns = @JoinColumn(name="booth_id", referencedColumnName = "id")
     )
-    @Column(length = 300)
+    @Column(columnDefinition = "VARCHAR(300)")
     private List<String> urls;
 }