add javascript course to Romanian books (#9025)

* add javascript course to Romanian books

* resave???

* Update books/free-programming-books-ro.md

* Update books/free-programming-books-ro.md

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

Co-authored-by: Eric Hellman <eric@hellman.net>
Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

books/free-programming-books-ro.md

@@ -3,6 +3,7 @@
 * [Ajax](#ajax)
 * [C](#c)
 * [HTML and CSS](#html-and-css)
+* [Javascript](#javascript)
 * [MySQL](#mysql)
 * [PHP](#php)
 * [Scratch](#scratch)
@@ -36,3 +37,10 @@
 ### Scratch
 
 * [Informatica Creativa](http://scratched.gse.harvard.edu/resources/informatica-creativa-0)
+
+
+### Javascript
+
+* [Curs si Tutoriale JavaScript](https://marplo.net/javascript)
+
+