[meld] Update copyright in About dialog (#603)

[Kai Willadsen <kaiw src gnome org>]

commit 60d7d33d6a611b8d41daa393f243db0946457de5
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sat Jul 24 16:24:20 2021 +1000

    Update copyright in About dialog (#603)

 meld/resources/ui/about-dialog.ui | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meld/resources/ui/about-dialog.ui b/meld/resources/ui/about-dialog.ui
index ceb11520..8ab0c602 100644
--- a/meld/resources/ui/about-dialog.ui
+++ b/meld/resources/ui/about-dialog.ui
@@ -6,7 +6,7 @@
     <property name="can_focus">False</property>
     <property name="type_hint">dialog</property>
     <property name="copyright" translatable="yes">Copyright © 2002-2009 Stephen Kennedy
-Copyright © 2009-2019 Kai Willadsen</property>
+Copyright © 2009-2021 Kai Willadsen</property>
     <property name="website">https://meldmerge.org/</property>
     <property name="authors">Stephen Kennedy
 Kai Willadsen