title: GitHub pages 404ing for .txt files but not any other files
body: <p>It's in the title. </p>
  
  <p>I've been trying to get text file app-ads.txt hosted at the root directory of my site</p>
  
  <p>When I go to mysite.com/index.html it works fine, but when I go to any .txt file (e.g. mysite.com/app-ads.txt or any other file like mysite.com/test.txt) it is a 404. </p>
  
  <p>How do I fix this?</p>