docs: Update porting guide for ansible 5.4.0 (#77107)

docs/docsite/rst/porting_guides/porting_guide_5.rst

@@ -1,5 +1,5 @@
 ..
-   THIS DOCUMENT IS AUTOMATICALLY GENERATED BY ANTSIBULL! PLEASE DO NOT EDIT MANUALLY! (YOU PROBABLY WANT TO EDIT porting_guide_base_2.12.rst)
+   THIS DOCUMENT IS AUTOMATICALLY GENERATED BY ANTSIBULL! PLEASE DO NOT EDIT MANUALLY! (YOU PROBABLY WANT TO EDIT porting_guide_core_2.12.rst)
 
 .. _porting_5_guide:
 
@@ -12,6 +12,9 @@ Ansible 5 Porting Guide
   :depth: 2
 
 
+Ansible 5 is based on Ansible-core 2.12.
+
+
 We suggest you read this page along with the `Ansible 5 Changelog <https://github.com/ansible-community/ansible-build-data/blob/main/5/CHANGELOG-v5.rst>`_ to understand what updates you may need to make.
 
 
@@ -31,6 +34,15 @@ Playbook
        vars:
          ansible_async_dir: /path/to/my/custom/dir
 
+* The ``undef()`` function is added to the templating environment for creating undefined variables directly in a template. Optionally, a hint may be provided for variables which are intended to be overridden.
+
+.. code-block:: yaml
+
+   vars:
+     old: "{{ undef }}"
+     new: "{{ undef() }}"
+     new_with_hint: "{{ undef(hint='You must override this variable') }}"
+
 Python Interpreter Discovery
 ============================
 
@@ -115,6 +127,30 @@ Networking
 
 No notable changes
 
+Porting Guide for v5.4.0
+========================
+
+Major Changes
+-------------
+
+chocolatey.chocolatey
+~~~~~~~~~~~~~~~~~~~~~
+
+- win_chocolatey - Added choco_args option to pass additional arguments directly to Chocolatey.
+
+vyos.vyos
+~~~~~~~~~
+
+- Add 'pool' as value to server key in ntp_global.
+
+Deprecated Features
+-------------------
+
+cisco.ios
+~~~~~~~~~
+
+- `ios_acls` - Deprecated fragment attribute added boolean alternate as enable_fragment.
+
 Porting Guide for v5.3.0
 ========================