Merge pull request laravel#2920 from brayniverse/patch-1

Fix typo

Author: taylorotwell

upgrade.md

@@ -137,7 +137,7 @@ The name of the trait and interface used by [Laravel Cashier](/docs/{{version}}/
 
 Move all of your command classes from your old `app/commands` directory to the new `app/Console/Commands` directory. Next, add the `app/Console/Commands` directory to the `classmap` directive of your `composer.json` file.
 
-Then, copy your list of Artisan commands from `start/artisan.php` into the `command` array of the `app/Console/Kernel.php` file.
+Then, copy your list of Artisan commands from `start/artisan.php` into the `commands` array of the `app/Console/Kernel.php` file.
 
 ### Database Migrations & Seeds