title: How can I change a secret Gist to public?
body: <p>I've uploaded a <code>Github Gist</code> and I've set it to be <code>secret</code>.</p>
  <p>Now I want to change the gist to <code>public</code>, but I can't find how to set it public.</p>
  <p>Could anyone help me about that?</p>