[gnome-contacts] flatpak: Fix typo

[Niels De Graef <nielsdg src gnome org>]

commit d401924224b8d9d69aaefbdc48f65d7472bcf3ac
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Aug 20 01:45:06 2019 +0200

    flatpak: Fix typo
    
    JSON doesn't like trailing commas.

 data/flatpak/org.gnome.Contacts.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/flatpak/org.gnome.Contacts.json b/data/flatpak/org.gnome.Contacts.json
index f2043d8..0e1501e 100644
--- a/data/flatpak/org.gnome.Contacts.json
+++ b/data/flatpak/org.gnome.Contacts.json
@@ -182,7 +182,7 @@
             "config-opts": [
                 "-Dgtk_doc=false",
                 "-Dintrospection=true",
-                "-Dman=false",
+                "-Dman=false"
             ],
             "sources": [
                 {