docs: supply documenets

Author: xiaoluoHe

docs/assets/option/en/component/crosshair-common/crosshair-line.md

@@ -16,7 +16,8 @@ Only effective for `type: 'line'`, `width` represents the width of the auxiliary
 
 #${prefix} smooth(boolean)
 
-Only effective for `type: 'line'`, whether to draw smoothly under the polar coordinate system or not.
+Whether to draw smoothly under the polar coordinate system or not.
+Effective for `type: 'polygon'` since version `1.13.3`
 
 {{ else }}
 #${prefix} width(number|string)

docs/assets/option/zh/component/crosshair-common/crosshair-line.md

@@ -16,7 +16,8 @@ crosshair 辅助线的类型，可选值为 `'line'` 和 `'rect'`。
 
 #${prefix} smooth(boolean)
 
-仅对 `type: 'line'` 生效，极坐标系下是否平滑绘制。
+极坐标系下是否平滑绘制。
+自版本 `1.13.3` 以上支持 `type: 'polygon'`。
 
 {{ else }}
 #${prefix} width(number|string)