codeigniter.com/user_guide is not updated

Hi everybody.
The guys who update the Codeigniter user guide website have stopped in version 4.4.5.
The latest version 4.5.1 has no information about change logs and how to upgrade from previous version.
https://codeigniter.com/user_guide/chang...index.html
https://codeigniter.com/user_guide/insta...ading.html
https://codeigniter.com/user_guide/insta...e_501.html
Please help us with it.
Thank you in advance.