Update service_container/service_subscribers_locators.rst

Co-Authored-By: XuruDragon <xurudragon@gmail.com>

Author: OskarStark

service_container/service_subscribers_locators.rst

@@ -457,7 +457,7 @@ retrieve the ``handler_two`` handler :
     {
         public function __construct(ServiceLocator $serviceLocator)
         {
-            $handler_two = $serviceLocator->get('handler_two'):
+            $handlerTwo = $locator->get('handler_two'):
         }
     }