更新 spot-light 组件的属性介绍

Author: zhefengzhang

versions/3.8/en/concepts/scene/light/lightType/spot-light.md

@@ -26,6 +26,7 @@ For the Spotlight component interface, please refer to [SpotLight API](%__APIDOC
 | Size | Sets the light size. |
 | Range | Sets the range of light effect. |
 | SpotAngle | Adjusts the spot angle to control the light range. |
+| AngleAttenuationStrength | The larger the value, the softer the edge, and the smaller the value, the harder the edge. |
 | Term | Sets the light intensity unit type, including **LUMINOUS_POWER** and **LUMINANCE**.
 | LuminousPower | Luminous flux in **lumens (lm)**. <br>Effective when **Term** is set to **LUMINOUS_POWER**. |
 | Luminance | Brightness in **Candela per square meter (cd/m<sup>2</sup>)**.<br>Effective when **Term** is set to **LUMINANCE**. |

versions/3.8/zh/concepts/scene/light/lightType/spot-light.md

@@ -26,6 +26,7 @@
 | Size | 设置光源大小 |
 | Range | 设置光照影响范围 |
 | SpotAngle | 调整聚光角度，控制光照范围 |
+| AngleAttenuationStrength | 聚光灯角度衰减强度。值越大，边缘越柔和，值越小，边缘越硬 |
 | Term | 设置光照强度单位类型，包括 **光通量（LUMINOUS_POWER）** 和 **亮度（LUMINANCE）** 两种 |
 | LuminousPower | 光通量，单位 **流明（lm）**<br>当 **Term** 设置为 **LUMINOUS_POWER** 时生效 |
 | Luminance | 亮度，单位 **坎德拉每平方米（cd/m<sup>2</sup>）**<br>当 **Term** 设置为 **LUMINANCE** 时生效 |