doc: change SGML markup "figure" to "example"

bmomjian · bmomjian · commit 71ae1a89d2ef · 2020-04-20T21:41:13.000-04:00
Reported-by: Jürgen Purtz Discussion: https://postgr.es/m/709d7809-d7f4-8175-47f3-4d131341bba8@purtz.de Author: Jürgen Purtz Backpatch-through: 9.5
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -11598,7 +11598,7 @@ table2-mapping
     converted into other XML-based formats.
    </para>
 
-   <figure id="xslt-xml-html">
+   <example id="xslt-xml-html">
     <title>XSLT Stylesheet for Converting SQL/XML Output to HTML</title>
 <programlisting><![CDATA[
 <?xml version="1.0"?>
@@ -11646,7 +11646,7 @@ table2-mapping
 
 </xsl:stylesheet>
 ]]></programlisting>
-   </figure>
+   </example>
   </sect2>
  </sect1>
 
