updates

src/main/java/stirling/software/SPDF/model/api/general/MergeMultiplePagesRequest.java

@@ -12,4 +12,7 @@ public class MergeMultiplePagesRequest extends PDFFile {
     @Schema(description = "The number of pages to fit onto a single sheet in the output PDF.",
             type = "integer", allowableValues = {"2", "3", "4", "9", "16"})
     private int pagesPerSheet;
+    
+    @Schema(description = "Boolean for if you wish to add border around the pages")
+    private boolean addBorder;
 }