JRuby no longer at Sourceforge, reported by Gilbert Rebhan

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@1157710 13f79535-47bb-0310-9956-ffa450edef68

manual/install.html

@@ -945,7 +945,7 @@ you need jakarta-oro 2.0.8 or later, and <a href="#commons-net">commons-net</a><
   <tr>
     <td>jruby.jar</td>
     <td>Ruby with script task</td>
-    <td><a href="http://jruby.sourceforge.net/" target="_top">http://jruby.sourceforge.net/</a></td>
+    <td><a href="http://jruby.org/" target="_top">http://jruby.org/</a></td>
   </tr>
   <tr>
     <td>judo.jar</td>