Docs fix: link to bugs and to-do list from home page was incorrect

git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@172458 13f79535-47bb-0310-9956-ffa450edef68

doc/xerces-c_book.xml

@@ -50,5 +50,5 @@
   <external href="http://&XercesDistDir;/"                        label="Download"/>
   <external href="http://xml.apache.org/websrc/cvsweb.cgi/xml-xerces/c/"     label="CVS Repository"/>
   <external href="http://archive.covalent.net "                   label="Mail Archive"/>
-  <external href="./bugs-todo.html"                               label="Bugs &amp; To Do List"/>
+  <external href="./bug-todo.html"                               label="Bugs &amp; To Do List"/>
 </book>