Update reference/configuration/doctrine.rst

Co-Authored-By: Oskar Stark <[email protected]>

Author: hectorprats

reference/configuration/doctrine.rst

@@ -160,7 +160,7 @@ getConnection method and the name of the connection::
 
 .. code-block:: php
 
-    $conex = $this->getDoctrine()->getConnection('customer');
+    $connection = $this->getDoctrine()->getConnection('customer');
     $result = $connection->fetchAll('select * from table');
 
 Doctrine ORM Configuration