Replaced old tower docs link with new AWX docs link (#14801)

README.md

@@ -7,7 +7,7 @@ AWX provides a web-based user interface, REST API, and task engine built on top
 
 To install AWX, please view the [Install guide](./INSTALL.md).
 
-To learn more about using AWX, and Tower, view the [Tower docs site](http://docs.ansible.com/ansible-tower/index.html).
+To learn more about using AWX, view the [AWX docs site](https://ansible.readthedocs.io/projects/awx/en/latest/).
 
 The AWX Project Frequently Asked Questions can be found [here](https://www.ansible.com/awx-project-faq).