add send urlLink example code in room class (#1752)

* add send urlLink example code in room class

* make the example more specific and meaningful

* 0.25.5

* remove chinese character

* make the example more specific and meaningful

* change indnetation to be two spaces

src/user/room.ts

@@ -427,6 +427,16 @@ export class Room extends Accessory implements Sayable {
    * // 5. Send text inside room and mention someone with Tagged Template
    * const contact2 = await bot.Contact.find({name: 'zixia'}) // change 'zixia' to any of the room member
    * await room.say`Hello ${contact}, here is the world ${contact2}`
+   *
+   * // 6. send url link in a room
+   *
+   * const urlLink = new UrlLink ({
+   *   description : 'WeChat Bot SDK for Individual Account, Powered by TypeScript, Docker, and Love',
+   *   thumbnailUrl: 'https://avatars0.githubusercontent.com/u/25162437?s=200&v=4',
+   *   title       : 'Welcome to Wechaty',
+   *   url         : 'https://github.com/chatie/wechaty',
+   * })
+   * await room.say(urlLink)
    */
   public async say (
     textOrListOrContactOrFileOrUrl : string | Contact | FileBox | UrlLink | TemplateStringsArray,