Merge pull request #442 from sz-p/doc-18144

add doc for apache/echarts#18164

Author: Ovilia

en/option/component/legend.md

@@ -487,6 +487,14 @@ The gap between the selector button.
 The gap between selector button and legend component.
 
 
+## triggerEvent(boolean) = false
+
+{{ use: partial-version(
+    version = "6.0.0"
+) }}
+
+Set this to `true` to enable triggering events.
+
 
 {{ target: partial-legend-style }}
 

zh/option/component/legend.md

@@ -581,7 +581,13 @@ selector: ['all', 'inverse']
 
 选择器按钮与图例组件之间的间隔。
 
+## triggerEvent(boolean) = false
 
+{{ use: partial-version(
+    version = "6.0.0"
+) }}
+
+是否触发事件。
 
 {{ target: partial-legend-style }}