Make it explicit that the status message can contain emojis

doc/api/users.md

@@ -497,7 +497,7 @@ Parameters:
 | Attribute | Type | Required | Description |
 | --------- | ---- | -------- | ----------- |
 | `emoji`   | string | no     | The name of the emoji to use as status, if omitted `speech_balloon` is used. Emoji name can be one of the specified names in the [Gemojione index][gemojione-index]. |
-| `message` | string | no | The message to set as a status |
+| `message` | string | no     | The message to set as a status. It can also contain emoji codes. |
 
 When both parameters are empty, the status will be cleared.