[calls] d/copyright: Update copyright

[Evangelos Ribeiro Tzaras <devrtz src gnome org>]

commit e7f53e256a6ed1bc043f8c720ae952f6c3cdf812
Author: Evangelos Ribeiro Tzaras <devrtz fortysixandtwo eu>
Date:   Mon Oct 18 11:18:09 2021 +0200

    d/copyright: Update copyright

 debian/copyright | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/debian/copyright b/debian/copyright
index 92483421..d68d5cd0 100644
--- a/debian/copyright
+++ b/debian/copyright
@@ -4,11 +4,11 @@ Source: https://gitlab.gnome.org/GNOME/calls
 License: GPL-3+
 
 Files: *
-Copyright: 2018 Purism SPC
+Copyright: 2018-2021 Purism SPC
 License: GPL-3+
 
 Files: data/sm.puri.Calls.metainfo.xml
-Copyright: 2018 Purism SPC
+Copyright: 2018-2021 Purism SPC
 License: CC0-1.0
 
 License: GPL-3+