* Update free-programming-books-langs.md

Added "How To Build Websites with HTML" by Erin Glass (DigitalOcean) and "Python Machine Learning Projects" by Lisa Tagliaferri and Brian Boucheron (DigitalOcean)

* Update books/free-programming-books-langs.md
Co-authored-by: NCleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>

* Update books/free-programming-books-langs.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* Update books/free-programming-books-langs.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NCleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>