fix(store): fix on store usage

Author: Guikingone

workflow/usage.rst

@@ -146,7 +146,7 @@ As configured, the following property is used by the marking store::
 
     class BlogPost
     {
-        // This property is used by the marking store, by default, Symfony "mark" this attribute as an array.
+        // This property is used by the marking store, by default, Symfony set the marking store as an array.
         public $currentPlace;
         public $title;
         public $content;