[gnome-text-editor] about: update copyright

[Christian Hergert <chergert src gnome org>]

commit 37e1fd014ab6e9e21ba600d62256cf1ad0d2b808
Author: Christian Hergert <chergert redhat com>
Date:   Thu Jan 6 13:18:45 2022 -0800

    about: update copyright

 src/editor-application-actions.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/editor-application-actions.c b/src/editor-application-actions.c
index 2e91eeb..7cf3531 100644
--- a/src/editor-application-actions.c
+++ b/src/editor-application-actions.c
@@ -107,7 +107,7 @@ editor_application_actions_about_cb (GSimpleAction *action,
 #else
   gtk_about_dialog_set_version (dialog, PACKAGE_VERSION);
 #endif
-  gtk_about_dialog_set_copyright (dialog, "© 2020-2021 Christian Hergert");
+  gtk_about_dialog_set_copyright (dialog, "© 2020-2022 Christian Hergert, et al.");
   gtk_about_dialog_set_documenters (dialog, documenters);
   gtk_about_dialog_set_license_type (dialog, GTK_LICENSE_GPL_3_0);
   gtk_about_dialog_set_website (dialog, PACKAGE_WEBSITE);