Update docs/en/cookbook/dql-user-defined-functions.rst

Co-authored-by: Claudio Zizza <[email protected]>

docs/en/cookbook/dql-user-defined-functions.rst

@@ -237,7 +237,7 @@ Typed functions
 By default, result of custom functions is fetched as-is from the database driver.
 If you want to be sure that the type is always the same, then your custom function needs to 
 implement ``Doctrine\ORM\Query\AST\TypedExpression``. Then, the result is wired
-through ``convertToPhpValue`` method of the ``Type`` returned from ``getReturnType``.
+through ``Doctrine\DBAL\Types\Type::convertToPhpValue()`` of the ``Type`` returned in ``getReturnType()``.
 
 .. code-block:: php