docs: update ref name

Author: kenjis

user_guide_src/source/incoming/controllers.rst

@@ -313,7 +313,7 @@ your **app/Config/Routes.php** file.
 
 CodeIgniter also permits you to map your URIs using its :ref:`Defined Route Routing <defined-route-routing>`..
 
-.. _controller-auto-routing:
+.. _controller-auto-routing-legacy:
 
 Auto Routing (Legacy)
 *********************

user_guide_src/source/incoming/routing.rst

@@ -712,7 +712,7 @@ Consider this URI::
 In the above example, CodeIgniter would attempt to find a controller named **Helloworld.php**
 and executes ``index()`` method with passing ``'1'`` as the first argument.
 
-See :ref:`Auto Routing (Legacy) in Controllers <controller-auto-routing>` for more info.
+See :ref:`Auto Routing (Legacy) in Controllers <controller-auto-routing-legacy>` for more info.
 
 Configuration Options (Legacy)
 ==============================
@@ -732,7 +732,7 @@ The default controller is also used when no matching route has been found, and t
 in the controllers directory. For example, if the user visits **example.com/admin**, if a controller was found at
 **app/Controllers/Admin/Home.php**, it would be used.
 
-See :ref:`Auto Routing in Controllers <controller-auto-routing>` for more info.
+See :ref:`Auto Routing (Legacy) in Controllers <controller-auto-routing-legacy>` for more info.
 
 Default Method (Legacy)
 -----------------------