When hosting stuff like blocklists on GitHub, please make sure you do not use raw.githubusercontent.com links. Since these links don't provide the last-modified header, they will get re-downloaded every single time pihole -g is run (or each week automatically) even if there are no new changes. That's a waste of time and bandwidth 
Since you've created a GitHub Pages Website, you can use the following URL which ensures only updates are downloaded: https://smokingwheels.github.io/Pi-hole/allhosts