docs: fix Config file paths

Author: kenjis

user_guide_src/source/incoming/controllers.rst

@@ -96,7 +96,7 @@ rule and message array formats, as well as available rules:
 .. literalinclude:: controllers/004.php
 
 If you find it simpler to keep the rules in the configuration file, you can replace
-the ``$rules`` array with the name of the group as defined in ``Config\Validation.php``:
+the ``$rules`` array with the name of the group as defined in **app/Config/Validation.php**:
 
 .. literalinclude:: controllers/005.php
 

user_guide_src/source/testing/controllers.rst

@@ -54,7 +54,7 @@ for details.
 withConfig($config)
 -------------------
 
-Allows you to pass in a modified version of **Config\App.php** to test with different settings:
+Allows you to pass in a modified version of **app/Config/App.php** to test with different settings:
 
 .. literalinclude:: controllers/005.php