[#4425] Adding missing slash thanks to stof

Author: weaverryan

components/using_components.rst

@@ -52,7 +52,7 @@ immediately::
     // File example: src/script.php
 
     // update this to the path to the "vendor/" directory, relative to this file
-    require_once __DIR__.'../vendor/autoload.php';
+    require_once __DIR__.'/../vendor/autoload.php';
 
     use Symfony\Component\Finder\Finder;