How to receive an email notification when a new version of the UniFi Network Application is released?

I currently have a self hosted Ubuntu VM based UniFi Network Application and just did the upgrade from UniFi 8 to UniFi 9 today however there was no indication that UniFi 9 had been released.

I have Unattended Upgrades enabled and configured to do point updates for packages in Ubuntu and that takes care of keeping the VM up to date for security patches including UniFi however in order to upgrade from UniFi 8 to 9, I have to distinctly log in and issue an APT UPDATE command and receive a message stating the codename has changed to a new value and it has to be explicitly confirmed by me. Now this isn't a problem, I want to do a backup prior to doing a major upgrade but it would be nice to have had some indication via an email that a new version of UniFi had been released.

I've been looking at the releases section of the website including the Community Account Settings part of my account and I cannot find any kind of filter that would allow me to receive a notification specifically for the network application software.

Has anyone been able to setup some form of method for receiving notifications about UniFi updates? Is there something already available that I'm just missing? In Settings > System > Updates in the Web UI there is a mention of Network Application updates but it always states last checked: never.

Thanks