Finalize release

Author: MGatner

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## [v4.1.8](https://github.com/codeigniter4/CodeIgniter4/tree/v4.1.8) (2022-01-XX)
+## [v4.1.8](https://github.com/codeigniter4/CodeIgniter4/tree/v4.1.8) (2022-01-24)
 
 [Full Changelog](https://github.com/codeigniter4/CodeIgniter4/compare/v4.1.7...v4.1.8)
 

user_guide_src/source/changelogs/v4.1.8.rst

@@ -1,7 +1,7 @@
 Version 4.1.8
 #############
 
-Release Date: January XX, 2022
+Release Date: January 24, 2022
 
 **4.1.8 release of CodeIgniter4**
 

user_guide_src/source/installation/upgrade_418.rst

@@ -0,0 +1,18 @@
+#############################
+Upgrading from 4.1.7 to 4.1.8
+#############################
+
+Please refer to the upgrade instructions corresponding to your installation method.
+
+- :ref:`Composer Installation App Starter Upgrading <app-starter-upgrading>`
+- :ref:`Composer Installation Adding CodeIgniter4 to an Existing Project Upgrading <adding-codeigniter4-upgrading>`
+- :ref:`Manual Installation Upgrading <installing-manual-upgrading>`
+
+.. contents::
+    :local:
+    :depth: 2
+
+Breaking Changes
+****************
+
+-  Due to a security issue in the ``API\ResponseTrait`` all trait methods are now scoped to ``protected``. See the `Security advisory` <https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-7528-7jg5-6g62>` for more information.