[gnome-control-center] flatpak: fix branches for a couple deps

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 9610c2e17bca243a902fff96e6893ba7ec4b6550
Author: Gustavo Noronha Silva <gustavo noronha dev br>
Date:   Mon Mar 28 18:38:01 2022 -0300

    flatpak: fix branches for a couple deps
    
    gweather and mobile-broadband-provider-info have moved to using main as their
    principal development branch.

 build-aux/flatpak/org.gnome.Settings.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.Settings.json b/build-aux/flatpak/org.gnome.Settings.json
index 046a0bbde..c56adcdc7 100644
--- a/build-aux/flatpak/org.gnome.Settings.json
+++ b/build-aux/flatpak/org.gnome.Settings.json
@@ -302,7 +302,7 @@
                 {
                     "type" : "git",
                     "url" : "https://gitlab.gnome.org/GNOME/libgweather.git";,
-                    "branch" : "libgweather-3"
+                    "branch" : "main"
                 }
             ]
         },
@@ -392,6 +392,7 @@
             "sources" : [
                 {
                     "type" : "git",
+                    "branch": "main",
                     "url" : "https://gitlab.gnome.org/GNOME/mobile-broadband-provider-info.git";
                 }
             ]