update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/js-apis-file-fs.md

@@ -2687,7 +2687,7 @@ Represents detailed file information. Before calling any API of the **Stat()** c
 | Name    | Type  | Readable  | Writable  | Description                                      |
 | ------ | ------ | ---- | ---- | ---------------------------------------- |                        
 | ino    | number | Yes   | No   | File ID. Different files on the same device have different **ino**s.|                 |
-| mode   | number | Yes   | No   | File permissions. The meaning of each bit is as follows:<br>- **0o400**: The owner has the read permission on a regular file or a directory entry.<br>- **0o200**: The owner has the permission to write a regular file or create and delete a directory entry.<br>- **0o100**: The owner has the permission to execute a regular file or search for the specified path in a directory.<br>- **0o040**: The user group has the read permission on a regular file or a directory entry.<br>- **0o020**: The user group has the permission to write a regular file or create and delete a directory entry.<br>- **0o010**: The user group has the permission to execute a regular file or search for the specified path in a directory.<br>- **0o004**: Other users have the permission to read a regular file or read a directory entry.<br>- **0o002**: Other users have the permission to write a regular file or create and delete a directory entry.<br>- **0o001**: Other users have the permission to execute a regular file or search for the specified path in a directory.|
+| mode   | number | Yes   | No   | File permissions. The meaning of each bit is as follows:<br>**NOTE**<br>The following values are in octal format. The returned values are in decimal format. You need to convert the values.<br>- **0o400**: The owner has the permission to read a regular file or a directory entry.<br>- **0o200**: The owner has the permission to write a regular file or create and delete a directory entry.<br>- **0o100**: The owner has the permission to execute a regular file or search for the specified path in a directory.<br>- **0o040**: The user group has the permission to read a regular file or a directory entry.<br>- **0o020**: The user group has the permission to write a regular file or create and delete a directory entry.<br>- **0o010**: The user group has the permission to execute a regular file or search for the specified path in a directory.<br>- **0o004**: Other users have the permission to read a regular file or a directory entry.<br>- **0o002**: Other users have the permission to write a regular file or create and delete a directory entry.<br>- **0o001**: Other users have the permission to execute a regular file or search for the specified path in a directory.|
 | uid    | number | Yes   | No   | ID of the file owner.|
 | gid    | number | Yes   | No   | ID of the user group of the file.|
 | size   | number | Yes   | No   | File size, in bytes. This parameter is valid only for regular files. |