docs/website: fix documentation link

Author: nydragon

README.md

@@ -10,7 +10,7 @@
 [#17]: https://github.com/snugnug/hjem-rum/issues/17
 [@eclairevoyant]: https://github.com/eclairevoyant
 [@NotAShelf]: https://github.com/NotAShelf
-[documentation]: snugnug.github.io/hjem-rum/
+[documentation]: https://snugnug.github.io/hjem-rum/
 
 A module collection for managing your `$HOME` with [Hjem].