Update facade docblocks

Author: taylorotwell

src/Illuminate/Support/Facades/Request.php

@@ -151,7 +151,7 @@
  * @method static string|array|null cookie(string|null $key = null, string|array|null $default = null)
  * @method static array allFiles()
  * @method static bool hasFile(string $key)
- * @method static \Illuminate\Http\UploadedFile|\Illuminate\Http\UploadedFile[]|array|null file(string|null $key = null, mixed $default = null)
+ * @method static array|(\Illuminate\Http\UploadedFile|\Illuminate\Http\UploadedFile[]|null file(string|null $key = null, mixed $default = null)
  * @method static \Illuminate\Http\Request dump(mixed $keys = [])
  * @method static never dd(mixed ...$args)
  * @method static bool exists(string|array $key)