Move Keywords / Reserved Words to own <h2> header

h2/src/docsrc/html/advanced.html

@@ -41,6 +41,8 @@ Advanced
     Two Phase Commit</a><br />
 <a href="#compatibility">
     Compatibility</a><br />
+<a href="#keywords">
+    Keywords / Reserved Words</a><br />
 <a href="#standards_compliance">
     Standards Compliance</a><br />
 <a href="#windows_service">
@@ -469,7 +471,7 @@ For a query, this means the transaction is committed even before the application
 Other database engines may commit the transaction in this case when the result set is closed.
 </p>
 
-<h3>Keywords / Reserved Words</h3>
+<h2 id="keywords">Keywords / Reserved Words</h2>
 <p>
 There is a list of keywords that can't be used as identifiers (table names, column names and so on),
 unless they are quoted (surrounded with double quotes).