update common-event.md (7720)

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/notification/common-event.md

@@ -119,7 +119,7 @@ import commonEvent from '@ohos.commonEvent'
 // Attributes of a common event.
 var options = {
     code: 1,			 // Result code of the common event
-	data: "initial data";// Result data of the common event
+    data: "initial data",// Result data of the common event
 }
 ```