fix: point link to the repository itself

The button "View on Github" was pointing to the Github Pages version of
the page.

In practice, each page ended up pointing to itself.

This change makes the button point to the (root of the) Github repository.

Author: rafaelbeirigo

_config.yml

@@ -28,6 +28,9 @@ url: "https://rafaelbeirigo.github.io/cybersec-dojo"
 remote_theme: pages-themes/minimal@v0.2.0
 github_username: rafaelbeirigo
 
+github:
+  repository_url: https://github.com/rafaelbeirigo/cybersec-dojo
+
 # Build settings
 theme: jekyll-theme-hacker
 plugins: