update link in index.html

Author: gera2342

index.html

@@ -228,7 +228,7 @@ <h2>Implementations, Extensions, and Variations of Standard ML</h2>
    </P>
   </LI>
   <LI>
-    <A HREF="http://www.cs.bham.ac.uk/research/poplog/freepoplog.html">
+    <A HREF="http://www.cs.bham.ac.uk/research/projects/poplog/freepoplog.html">
        <strong>Poplog Standard ML</strong></A>.
     <P>Now available as free software (SML '90).</P>
   </LI>