docs: add link to detailed page

Author: kenjis

user_guide_src/source/changelogs/v4.2.0.rst

@@ -101,7 +101,7 @@ Others
 - New :doc:`../outgoing/view_decorators` allow modifying the generated HTML prior to caching.
 - Added Validation Strict Rules. See :ref:`validation-traditional-and-strict-rules`.
 - Added support for webp files to **app/Config/Mimes.php**.
-- RouteCollection::addRedirect() can now use placeholders.
+- ``RouteCollection::addRedirect()`` can now use placeholders. See :ref:`redirecting-routes` for details.
 - Debugbar enhancements
     - Debug toolbar is now using ``microtime()`` instead of ``time()``.
 - Added a sample file for `Preloading <https://www.php.net/manual/en/opcache.preloading.php>`_. See **preload.php**.

user_guide_src/source/incoming/routing.rst

@@ -202,6 +202,8 @@ define an array of routes and then pass it as the first parameter to the ``map()
 
 .. literalinclude:: routing/021.php
 
+.. _redirecting-routes:
+
 Redirecting Routes
 ==================
 
@@ -213,6 +215,8 @@ redirect and is recommended in most cases:
 
 .. literalinclude:: routing/022.php
 
+.. note:: Since v4.2.0 ``addRedirect()`` can use placeholders.
+
 If a redirect route is matched during a page load, the user will be immediately redirected to the new page before a
 controller can be loaded.