update docs

Signed-off-by: Nge-yafang <geyafang@huawei.com>

zh-cn/application-dev/reference/apis/js-apis-data-rdb.md

@@ -7,7 +7,7 @@
 
 ## 导入模块
 
-```
+```js
 import data_rdb from '@ohos.data.rdb';
 ```
 

zh-cn/application-dev/reference/apis/js-apis-data-storage.md

@@ -12,7 +12,7 @@
 
 ## 导入模块
 
-```
+```js
 import dataStorage from '@ohos.data.storage';
 ```