chore:watermark.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Wesley-0808

src/watermark/watermark.ts

@@ -67,7 +67,7 @@ export default class Watermark extends SuperComponent {
             lineSpace: props.lineSpace,
             alpha: props.alpha,
             gapX: gapX,
-            gapY: gapX,
+            gapY: gapY,
             watermarkContent: props.watermarkContent,
             offsetLeft: offsetLeft,
             offsetTop: offsetTop,