Docs feedback: How to upgrade from Omnibus 11 to 12

Trying to upgrade from 11 to 12 using these docs:

https://docs.gitlab.com/ce/update/

https://docs.gitlab.com/omnibus/update/README.html

I cannot find any documentation the describes how to upgrade to the next major version. In my case I am on Ubuntu Ominbus 11.8 and want to upgrade to the latest version, which is 12.2. When I run these commands, which are shown at https://docs.gitlab.com/omnibus/update/README.html, it upgrades to 11.10:

# Debian/Ubuntu
sudo apt-get update
sudo apt-get install gitlab-ce

How do I get to 12.2?

Edited Sep 20, 2019 by Daemmon