Update reference/configuration/doctrine.rst

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

Author: hectorprats

reference/configuration/doctrine.rst

@@ -156,7 +156,7 @@ which is the first one defined or the one configured via the
 
 Each connection is also accessible via the ``doctrine.dbal.[name]_connection``
 service where ``[name]`` is the name of the connection. Or directly in the controller with 
-getConnection method and the name of the connection.
+getConnection method and the name of the connection::
 
 .. code-block:: php