[12.x] Clarify custom Artisan command discovery outside default directory (#10454)

* Clarify custom Artisan command discovery outside default directory

* Update artisan.md

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Co-authored-by: Taylor Otwell <taylor@laravel.com>

Author: AhmedAlaa4611

artisan.md

@@ -108,7 +108,7 @@ Typically, Tinker automatically aliases classes as you interact with them in Tin
 <a name="writing-commands"></a>
 ## Writing Commands
 
-In addition to the commands provided with Artisan, you may build your own custom commands. Commands are typically stored in the `app/Console/Commands` directory; however, you are free to choose your own storage location as long as your commands can be loaded by Composer.
+In addition to the commands provided with Artisan, you may build your own custom commands. Commands are typically stored in the `app/Console/Commands` directory; however, you are free to choose your own storage location as long as you instruct Laravel to [scan other directories for Artisan commands](#registering-commands).
 
 <a name="generating-commands"></a>
 ### Generating Commands