You're right, we probably ought to mention that in the description, regardless of how long the Angular team will be supporting 1.x. Sending that feedback to the content team.

ETA: http://www.codecademy.com/learn/learn-angularjs "Learn how to build web apps using AngularJS 1.x. By the end of the course, you'll be able to use AngularJS to create powerful apps of your own."