mirrors/index.md: Add voidlinux.qontinuum.space mirror

Author: Qontinuum

src/xbps/repositories/mirrors/index.md

@@ -42,6 +42,7 @@ sub-repository.
 | <http://ftp.dk.xemacs.org/voidlinux/>              | EU: Denmark       |
 | <https://mirrors.dotsrc.org/voidlinux/>            | EU: Denmark       |
 | <https://quantum-mirror.hu/mirrors/pub/voidlinux/> | EU: Hungary       |
+| <https://voidlinux.qontinuum.space:4443/>          | EU: Monaco        |
 | <http://ftp.debian.ru/mirrors/voidlinux/>          | EU: Russia        |
 | <https://mirror.yandex.ru/mirrors/voidlinux/>      | EU: Russia        |
 | <https://cdimage.debian.org/mirror/voidlinux/>     | EU: Sweden        |