html-valid-content-model
If set, the content-model of the html element will be enforced: at most one head and one body tag may appear, in that order. No other tags are allowed.
The following patterns are considered violations:
<html>
  <head>
    ...
  </head>
  <main>
    ...
  <main>
</html>
<html>
  <body>
    ...
  <body>
  <head>
    ...
  </head>
</html>
The following patterns are not considered violations:
<html>
  <head>
    ...
  </head>
  <body>
    ...
  <boby>
</html>