title: Why does my GitHub page not update its content?
body: <p>I've been following the <a href="https://pages.github.com/" rel="noreferrer">official guide @ pages.github.com</a></p>
  <p>So far I've created the local repo and pushed it to GitHub, but, whatever change I do, I can see it in my repo at GitHub but <em>not</em> in my GitHub page. How is that possible?</p>