docs(*): add links to Discord's API objects & data (#5862)

src/structures/DMChannel.js

@@ -12,7 +12,7 @@ const MessageManager = require('../managers/MessageManager');
 class DMChannel extends Channel {
   /**
    * @param {Client} client The instantiating client
-   * @param {Object} data The data for the DM channel
+   * @param {APIChannel} data The data for the DM channel
    */
   constructor(client, data) {
     super(client, data);