docs: change decration for file paths

Author: kenjis

user_guide_src/source/installation/installing_manual.rst

@@ -9,8 +9,8 @@ The `CodeIgniter 4 framework <https://github.com/codeigniter4/framework>`_
 repository holds the released versions of the framework.
 It is intended for developers who do not wish to use Composer.
 
-Develop your app inside the ``app`` folder, and the ``public`` folder
-will be your public-facing document root. Do not change anything inside the ``system``
+Develop your app inside the **app** folder, and the **public** folder
+will be your public-facing document root. Do not change anything inside the **system**
 folder!
 
 .. note:: This is the installation technique closest to that described
@@ -37,7 +37,7 @@ See :ref:`initial-configuration` for the detail.
 Upgrading
 =========
 
-Download a new copy of the framework, and then replace the ``system`` folder.
+Download a new copy of the framework, and then replace the **system** folder.
 
 Read the :doc:`upgrade instructions <upgrading>`, and check Breaking Changes and Enhancements.
 
@@ -65,8 +65,8 @@ If you want to take advantage of the system message translations,
 they can be added to your project in a similar fashion.
 
 Download the `latest version of them <https://github.com/codeigniter4/translations/releases/latest>`_.
-Extract the downloaded zip, and copy the ``Language`` folder contents in it
-to your ``PROJECT_ROOT/app/Languages`` folder.
+Extract the downloaded zip, and copy the **Language** folder contents in it
+to your **app/Languages** folder.
 
 This would need to be repeated to incorporate any updates
 to the translations.