Add comments to bbox_list

Author: mose-x.zm

src/main/java/com/alibaba/dashscope/aigc/imagegeneration/ImageGenerationParam.java

@@ -79,8 +79,7 @@ public class ImageGenerationParam extends HalfDuplexServiceParam {
   private Boolean enableSequential;
 
   /**
-   * The bounding boxes for the images.
-   * The structure is [image_index][box_index][x1, y1, x2, y2].
+   * The bounding boxes for the images. The structure is [image_index][box_index][x1, y1, x2, y2].
    */
   @Builder.Default private List<List<List<Integer>>> bboxList = null;