* added deeplearning.ai artificial intell course details
* repositioned by alphabetical order
* Update courses/free-courses-en.md
Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>
* altered url and removed author to keep consistent with document
Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>