title: html amp thai charset
body: <p>I have a test page in amp (accelerated mobile page). It is validate as well but the Thai characters are not correctly shown.
  <a href="http://www.pizzaoventhailand.com/future/index.html" rel="nofollow">AMP validate Thai symbols wrong</a></p>
  
  <p>Then I have the same page were I substitute <code>&lt;meta charset="utf-8"&gt;</code> with <code>&lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8"&gt;</code> in this case the Thai characters are render correctly but the page is not anymore validate:<a href="http://www.pizzaoventhailand.com/future/index2.html" rel="nofollow">AMP not validate Thai symbol OK</a></p>
  
  <p>You can see the Thai language mouseover on the Thai flag (as title) and as last word in the page. How can I correctly render Thai characters in AMP?</p>