Mention Sun Microsystems in debian/copyright

debian/changelog

@@ -2,4 +2,4 @@ plexus-xml (3.0.1-1) unstable; urgency=medium
 
   * Initial release (Closes: #1077332)
 
- -- Emmanuel Bourg <ebourg@apache.org>  Sun, 28 Jul 2024 16:23:56 +0200
+ -- Emmanuel Bourg <ebourg@apache.org>  Wed, 11 Sep 2024 21:39:15 +0200

debian/copyright

@@ -4,6 +4,7 @@ Source: https://codehaus-plexus.github.io/plexus-xml/
 
 Files: *
 Copyright: 2001-2010, Codehaus
+           2004, Sun Microsystems, Inc
            2011-2015, Kristian Rosenvold
            2011-2023, Olivier Lamy
            2011-2023, Hervé Boutemy