* Update free-courses-fa_IR.md

A new section for Reactjs under Javascript was added, also a new youtube complete tutorial for Reactjs is added.

* Apply suggestions from code review
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>