修复 DateRangeDialog 调用 JavaFX 21 API 的问题 (#6979)

HMCL/src/main/java/org/jackhuang/hmcl/ui/FXUtils.java

@@ -1574,7 +1574,9 @@ public final class FXUtils {
 
             setHeading(new Label(i18n("button.select_date")));
 
-            GridPane body = new GridPane(4, 8);
+            GridPane body = new GridPane();
+            body.setHgap(4);
+            body.setVgap(8);
             {
                 Label fromLabel = new Label(i18n("button.select_date.from"));
                 this.fromPicker = new JFXDatePicker(LocalDate.now());