[book][orm] Fixing a few typos

Author: weaverryan

book/doctrine/orm.rst

@@ -546,12 +546,12 @@ types such as strings, integers and fields. However you can also integrate
 them nicely with associations.
 
 This is done by the help of a dedicated field:
-:class:`Symfony\\Brigde\Doctrine\Form\Type\EntityType`. It provides a list of
+:class:`Symfony\\Bridge\\Doctrine\\Form\\Type\\EntityType`. It provides a list of
 choices from which an entity can be selected.
 
 .. code-block:: php
 
- use Symfony\Component\Form\EntityChoiceField;
+ use Symfony\Bridge\Doctrine\Form\Type\EntityType;
 
  $builder->add('users','entity',
  array('class' => 'Acme\\HelloBundle\\Entity\\User',