Update to use with MarkDown

[gabrielizalo]

As you can see with Markdown files our Notepad++ is very ugly.

[gabrielizalo]

This guys worked Markdown support for Notepad ++: markdown-plus-plus

[Edditoria]

Thanks @gabrielizalo for introducing this nice theme to me. 😄
I've added the UDL in my repo (markdown-plus-plus)
This is the first time I release an UDL for non-preinstalled theme. Yay~!

[Codextor]

@Edditoria thanks for adding the UDL for this theme, especially given it's not preinstalled 😃

@gabrielizalo this is how a markdown file looks after downloading the customized UDL file