Close #3728: 为更新日志对话框添加平滑滚动 (#3729)

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

@@ -69,6 +69,7 @@ public final class UpgradeDialog extends JFXDialogLayout {
             if (exception == null) {
                 ScrollPane scrollPane = new ScrollPane(result);
                 scrollPane.setFitToWidth(true);
+                FXUtils.smoothScrolling(scrollPane);
                 setBody(scrollPane);
             } else {
                 LOG.warning("Failed to load update log, trying to open it in browser");