improve wording

Author: mvorisek

demos/layout/layouts.php

@@ -18,8 +18,8 @@
     ['page' => ['layouts_nolayout'], 'title' => 'HTML without layout'],
     ['page' => ['layouts_manual'], 'title' => 'Manual layout'],
     ['page' => ['../basic/header', 'layout' => Layout\Centered::class], 'title' => 'Centered layout'],
-    ['page' => ['layouts_admin'], 'title' => 'Admin Layout'],
-    ['page' => ['layouts_error'], 'title' => 'Exception Error'],
+    ['page' => ['layouts_admin'], 'title' => 'Admin layout'],
+    ['page' => ['layouts_error'], 'title' => 'Exception page'],
 ];
 
 // layout