[gnome-todo] flatpak: switch libportal to use the main branch

[Jordan Petridis <jpetridis src gnome org>]

commit faf1a495019c9840df18e7591fcca576778c4a9e
Author: Jordan Petridis <jordan centricular com>
Date:   Mon May 23 18:28:42 2022 +0300

    flatpak: switch libportal to use the main branch

 build-aux/flatpak/org.gnome.Todo.json | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/build-aux/flatpak/org.gnome.Todo.json b/build-aux/flatpak/org.gnome.Todo.json
index ff3bd23c..7c5ef7a6 100644
--- a/build-aux/flatpak/org.gnome.Todo.json
+++ b/build-aux/flatpak/org.gnome.Todo.json
@@ -150,6 +150,7 @@
             "sources" : [
                 {
                     "type" : "git",
+                    "branch" : "main",
                     "url" : "https://github.com/flatpak/libportal.git";
                 }
             ]