update docs

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/apis/js-apis-util.md

@@ -1782,7 +1782,7 @@ Checks whether the input value is of the **Date** type.
 - Return values
     | Type | Description |
   | -------- | -------- |
-  | boolean | Returns **true** if the input value is of the **Data** type; returns **false** otherwise. | 
+  | boolean | Returns **true** if the input value is of the **Date** type; returns **false** otherwise. |
 
 - Example