Remove trailing white space from COPYING

(cherry picked from https://gitlab.xiph.org/xiph/speexdsp/-/commit/68311d46785be76d2a186c75578d51108bff6dfb)
Signed-off-by: Tristan Matthews <tmatth@videolan.org>

Author: orbea

COPYING

@@ -1,7 +1,7 @@
 Copyright 2002-2008 	Xiph.org Foundation
 Copyright 2002-2008 	Jean-Marc Valin
 Copyright 2005-2007	Analog Devices Inc.
-Copyright 2005-2008	Commonwealth Scientific and Industrial Research 
+Copyright 2005-2008	Commonwealth Scientific and Industrial Research
                         Organisation (CSIRO)
 Copyright 1993, 2002, 2006 David Rowe
 Copyright 2003 		EpicGames