[five-or-more] Use games-1-8 branch to fix flatpak build

[Robert Roth <robertroth src gnome org>]

commit ea58619ca86c269bea5a7609f6df0cef617e5473
Author: Robert Roth <robert roth bee-tf ro>
Date:   Fri Mar 11 07:57:37 2022 +0200

    Use games-1-8 branch to fix flatpak build

 org.gnome.five-or-more.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/org.gnome.five-or-more.json b/org.gnome.five-or-more.json
index f8cf2b5..754cca2 100644
--- a/org.gnome.five-or-more.json
+++ b/org.gnome.five-or-more.json
@@ -31,6 +31,7 @@
             "buildsystem": "meson",
             "sources": [{
                 "type": "git",
+                "branch": "games-1-8",
                 "url": "https://gitlab.gnome.org/GNOME/libgnome-games-support.git";
             }]
         },