Update "Promoted Devices" page

[JohnReedLOL]

Please update https://ubports.com/en/supported-products . For example, Fairphone 2 should be replaced with Fairphone 4 because "The Fairphone 2 is not supported by the current Ubuntu Touch release", but Fairphone 4 is. Also, Nexus 5 isn't supported with Ubuntu 20.04 Focal, only the older 16.04 Xenial. Prospective new users coming from Google shouldn't be seeing this out of date stuff.

[JohnReedLOL]

But yeah, that is the first thing new users coming in looking to determine what device to use Ubuntu Touch with see. It's what's under "Promoted Devices" on https://ubports.com/en/ (see screenshot). As a new user, I shouldn't be lead astray by this bad information. Also, finding out that this bad, outdated information is at the front of the project for everyone to immediately see makes the project look unprofessional, like it is not well maintained.