Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Event.php

@@ -21,7 +21,7 @@
  * @method static void forgetPushed()
  * @method static \Illuminate\Events\Dispatcher setQueueResolver(callable $resolver)
  * @method static \Illuminate\Events\Dispatcher setTransactionManagerResolver(callable $resolver)
- * @method static mixed defer(callable $callback, ?array $events = null)
+ * @method static mixed defer(callable $callback, array|null $events = null)
  * @method static array getRawListeners()
  * @method static void macro(string $name, object|callable $macro)
  * @method static void mixin(object $mixin, bool $replace = true)