Nomad non-enterprise minor version support

Hello!

I’m currently looking into updating our Nomad cluster to the latest version.
I’ve been trying to find a documentation for how much time the non-enterprise release is being supported with patch (minor) versions.
For example: Nomad 1.7.x, the last non-enterprise release was for 1.7.7, but for 1.6.x it was 1.6.10.
Is this logic for releasing minor versions documented somewhere? Or could somebody please shed some light?

Thank you.