Fix syntax

Author: Arkalo2

forms.rst

@@ -1000,11 +1000,11 @@ Here, the referral code is an extra field injected at view level.
 The field name is composed of form ``user_create`` and the field name ``referralCode``.
 It's automatically generated from the form class name. You can :ref:`override it <changing-the-form-name>`
 
-Or you can use use
+Or you can use
 
 .. code-block:: twig
 
-    {{ form.vars.full_name ~ '[referralCode]' }} 
+    {{ form.vars.full_name ~ '[referralCode]' }}
     
 to render the form name dynamically