docs: Add missing @extends

#9028 djs

src/structures/interfaces/Application.js

@@ -12,6 +12,7 @@ let deprecationEmittedForFetchAssets = false;
 
 /**
  * Represents an OAuth2 Application.
+ * @extends {Base}
  * @abstract
  */
 class Application extends Base {

src/structures/interfaces/Collector.js

@@ -25,6 +25,7 @@ const Util = require('../../util/Util');
 
 /**
  * Abstract class for defining a new Collector.
+ * @extends {EventEmitter}
  * @abstract
  */
 class Collector extends EventEmitter {