Update the docs that are relevant to the tours on senseilms.com

[Imran92]

In different parts of our tours, we show the users some links to our online documentation. So it's important to keep those pages up to date. We'll check those URLs and update them if necessary.

Course Tour:

Course outline doc

Lesson Quiz Tour:

Questions doc Quiz settings Quizzes

Selling Courses with WooCommerce:

Docs