remove the parens around (s) so that lintain won't complain

git-svn-id: http://svn.xiph.org/trunk/ao@5454 0101bb08-14d6-0310-b084-bc0e0c8e3800

debian/copyright

@@ -3,7 +3,7 @@ Sun, 29 Oct 2000 00:39:24 -0500.
 
 It was downloaded from http://www.vorbis.com/download_unix.psp
 
-Upstream Author(s):	Aaron Holtzman
+Upstream Authors:	Aaron Holtzman
 			Stan Seibert <indigo@aztec.asu.edu>
 			Jack Moffitt <jack@icecast.org>
 			Ralph Giles <giles@ashlu.bc.ca>