Use Title: meta instead of explicit <h1>

Author: tantek

css-text-decor-3/Overview.bs

@@ -1,6 +1,5 @@
-<h1>CSS Text Decoration Module Level 3</h1>
-
 <pre class='metadata'>
+Title: CSS Text Decoration Module Level 3
 Shortname: css-text-decor
 Level: 3
 Status: ED