Fix stupid error

Author: fantasai

css3-lists/Overview.html

@@ -7,7 +7,7 @@
   <link href="http://dev.w3.org/csswg/default.css" rel=stylesheet
   type="text/css">
 
-  <style type="css">
+  <style type="text/css">
 	p { text-indent: 0 !important; margin: .5em 0; }
 	code.inline { white-space: pre-line; }
 	.alphabetic-example { font-family: monospace; font-size: 90%; margin: 1em 0 1em 2em; }