docs: Add missing @extends (#9028)

src/client/websocket/WebSocketManager.js

@@ -31,7 +31,7 @@ const UNRESUMABLE_CLOSE_CODES = [
  * The WebSocket manager for this client.
  * <info>This class forwards raw dispatch events,
  * read more about it here {@link https://discord.com/developers/docs/topics/gateway}</info>
- * @extends EventEmitter
+ * @extends {EventEmitter}
  */
 class WebSocketManager extends EventEmitter {
   constructor(client) {

src/client/websocket/WebSocketShard.js

@@ -17,6 +17,7 @@ try {
 
 /**
  * Represents a Shard's WebSocket connection
+ * @extends {EventEmitter}
  */
 class WebSocketShard extends EventEmitter {
   constructor(manager, id) {