[gnome-software] trivial: Fix translator comment

[Kalev Lember <klember src gnome org>]

commit 8ffe36c7973c4f4a3fcb2c666055907b03e2bee2
Author: Kalev Lember <klember redhat com>
Date:   Fri Sep 14 14:42:15 2018 +0200

    trivial: Fix translator comment
    
    Thanks Andre Klapper for pointing it out!

 src/gs-update-monitor.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gs-update-monitor.c b/src/gs-update-monitor.c
index 95e17e56..ac2294ab 100644
--- a/src/gs-update-monitor.c
+++ b/src/gs-update-monitor.c
@@ -242,7 +242,7 @@ _build_autoupdated_notification (GsUpdateMonitor *monitor, GsAppList *list)
                GsApp *app1 = gs_app_list_index (list_apps, 0);
                GsApp *app2 = gs_app_list_index (list_apps, 1);
                GsApp *app3 = gs_app_list_index (list_apps, 2);
-               /* TRANSLATORS: %1 and %2 are both application names, e.g. Firefox */
+               /* TRANSLATORS: %1, %2 and %3 are all application names, e.g. Firefox */
                g_string_append_printf (body, _("Includes %s, %s and %s."),
                                        gs_app_get_name (app1),
                                        gs_app_get_name (app2),