Adding both OSDev.org and OSDev.wiki to the "For more general information, see..." section down of "Build your own Operating System", due to request in #1283

Author: FabriLluvia

README.md

@@ -260,7 +260,7 @@ It's a great way to learn.
 * [**Python**: _Neural Networks: Zero to Hero_](https://www.youtube.com/playlist?list=PLAqhIrjkxbuWI23v9cThsA9GvCAUhRvKZ)
 
 #### Build your own `Operating System`
-_For more general information, see OSDev.org_
+_For more general information, see OSDev.org and OSDev.wiki_
 
 * [**Assembly**: _Writing a Tiny x86 Bootloader_](http://joebergeron.io/posts/post_two.html)
 * [**Assembly**: _Baking Pi – Operating Systems Development_](http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/index.html)