add new Book - Debian GNU/Linux Anwenderhandbuch (#9157)

* add new Book - Debian GNU/Linux Anwenderhandbuch

* Fix Alphabetical ordering

* online to HTML

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

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

books/free-programming-books-de.md

@@ -165,6 +165,7 @@
 
 ### Linux
 
+* [Debian GNU/Linux Anwenderhandbuch](https://debiananwenderhandbuch.de) - Frank Ronneburg (HTML)
 * [Linux - Das umfassende Handbuch](https://openbook.rheinwerk-verlag.de/linux/) - Johannes Plötner, Steffen Wendzel (HTML)