updated file location

git-svn-id: http://svn.xiph.org/trunk/ao@2625 0101bb08-14d6-0310-b084-bc0e0c8e3800

debian/copyright

 This package was debianized by Christopher L Cheney <ccheney@debian.org> on
 Sun, 29 Oct 2000 00:39:24 -0500.
 
-It was downloaded from http://www.xiph.org/ogg/vorbis/download/
+It was downloaded from http://www.vorbis.com/download_unix.psp
 
 Upstream Author(s):	Aaron Holtzman
 			Stan Seibert <indigo@aztec.asu.edu>