add effect component doc

Signed-off-by: Nyanjin1122 <976819878@qq.com>

zh-cn/application-dev/reference/arkui-ts/ts-container-effectcomponent.md

@@ -49,7 +49,7 @@ struct Index {
         EffectComponent() {
           Column() {
 
-            Text("Normal text without blur")
+            Text("Normal text without blur effect")
               .fontSize(30)
               .fontWeight(FontWeight.Bold)
               .borderRadius(20)
@@ -78,3 +78,5 @@ struct Index {
   }
 }
 ```
+
+![zh-cn_image_effectcomponent](figures/zh-cn_image_effectcomponent.png)
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