With more and more content being hosted on GitHub it's a shame that you can't get notified when a particular file has changed. At least not by GitHub, that is. But you can build your own notification service. Here is how. GitHub is more than just the place where developers post their code.
https://blog.mastykarz.nl/get-notified-file-github-changed/
https://blog.mastykarz.nl/get-notified-file-github-changed/