Update copyright.

debian/changelog

@@ -1,6 +1,7 @@
 qtermwidget (1.4.0-0ubuntu1) UNRELEASED; urgency=medium
 
   * New upstream release.
+  * Update copyright.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Sun, 12 Nov 2023 17:05:59 -0600
 

debian/copyright

@@ -3,7 +3,7 @@ Upstream-Name: qtermwidget
 Source: https://github.com/lxqt/qtermwidget
 
 Files: *
-Copyright: 2013-2022 LXQt team
+Copyright: 2013-2023 LXQt team
                      Adam Treat <atreat@rim.com>
                      Chris Mueller <ruunsmail@googlemail.com>
                 2013 Christian Surlykke <christian@surlykke.dk>