[gnome-builder/gnome-builder-41] build: update dependency branches

[Christian Hergert <chergert src gnome org>]

commit c4cf566b9fae793363722a323a2d6afdae04b311
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 30 14:11:49 2021 -0700

    build: update dependency branches
    
    These have moved to "main".

 build-aux/flatpak/org.gnome.Builder.json | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index bd364a915..51cf5f2ec 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -356,7 +356,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/template-glib.git";
+                    "url" : "https://gitlab.gnome.org/GNOME/template-glib.git";,
+                    "branch" : "main"
                 }
             ]
         },
@@ -371,7 +372,8 @@
             "sources" : [
                 {
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/jsonrpc-glib.git";
+                    "url" : "https://gitlab.gnome.org/GNOME/jsonrpc-glib.git";,
+                    "branch" : "main"
                 }
             ]
         },
@@ -662,7 +664,8 @@
                 {
                     "disable-shallow-clone" : true,
                     "type" : "git",
-                    "url" : "https://gitlab.gnome.org/GNOME/gnome-builder.git";
+                    "url" : "https://gitlab.gnome.org/GNOME/gnome-builder.git";,
+                    "branch" : "main"
                 }
             ],
             "post-install" : [