Fix minor typo in default template code.

lib/python/Products/PageTemplates/www/default.html

@@ -6,7 +6,7 @@
     
     <h2><span tal:replace="here/title_or_id">content title or id</span>
         <span tal:condition="template/title"
-              tal:replace="template/title">optional template id</span></h2>
+              tal:replace="template/title">optional template title</span></h2>
 
     This is Page Template <em tal:content="template/id">template id</em>.
   </body>