[css-syntax][meta] markup fix

Author: tabatkins

css-syntax-3/Overview.bs

@@ -2972,11 +2972,10 @@ Defining Grammars for Rules and Other Values</h2>
 	Tokens match if their value is a match for the value defined in the grammar.
 	Unless otherwise specified, all matches are <a>ASCII case-insensitive</a>.
 
-	<p class=note>
-		Although it is possible, with <a>escaping</a>,
-		to construct an <<ident-token>> whose value ends with <code>(</code> or  starts with <code>@</code>,
-		such a tokens is not a <<function-token>> or an <<at-keyword-token>>
-		and does not match corresponding grammar definitions.
+	Note: Although it is possible, with <a>escaping</a>,
+	to construct an <<ident-token>> whose value ends with <code>(</code> or  starts with <code>@</code>,
+	such a tokens is not a <<function-token>> or an <<at-keyword-token>>
+	and does not match corresponding grammar definitions.
 
 	<<delim-token>>s are written with their value enclosed in single quotes.
 	For example, a <<delim-token>> containing the "+" <a>code point</a> is written as <code>'+'</code>.