docs: add changelog

Author: kenjis

user_guide_src/source/changelogs/v4.5.0.rst

@@ -123,9 +123,11 @@ Helpers and Functions
 Others
 ======
 
-- **Autoloader:** Autoloading performance when using Composer has been improved.
-  Adding the ``App`` namespace in the ``autoload.psr4`` setting in **composer.json**
-  may also improve the performance of your app. See :ref:`autoloader-application-namespace`.
+- **Autoloader:**
+    - Autoloading performance when using Composer has been improved.
+      Adding the ``App`` namespace in the ``autoload.psr4`` setting in **composer.json**
+      may also improve the performance of your app. See :ref:`autoloader-application-namespace`.
+    - FileLocator Caching implemented. See :ref:`file-locator-caching` for details.
 - **CodeIgniter:** Added a pseudo-variable ``{memory_usage}`` to show your memory
   usage in your view files, which was supported by CodeIgniter 3.
 

user_guide_src/source/concepts/autoloader.rst

@@ -143,6 +143,7 @@ autoloader will be the first one to get a chance to locate the file.
 
 .. _file-locator-caching:
 
+*******************
 FileLocator Caching
 *******************