[gnome-builder] Update flatpak builder branch to main

[Christian Hergert <chergert src gnome org>]

commit 3d84cbacb52787a5068f3b00e1957d051294a668
Author: Steven Oliver <oliver steven gmail com>
Date:   Thu Sep 29 02:41:11 2022 +0000

    Update flatpak builder branch to main

 build-aux/flatpak/local-build.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/local-build.sh b/build-aux/flatpak/local-build.sh
index 4312ecec6..c9da9cef3 100755
--- a/build-aux/flatpak/local-build.sh
+++ b/build-aux/flatpak/local-build.sh
@@ -5,7 +5,7 @@ rm -rf _build ; mkdir _build
 rm -rf _repo ; mkdir _repo
 
 STATE_DIR=~/.cache/gnome-builder/flatpak-builder
-BRANCH=master
+BRANCH=main
 
 flatpak-builder \
     --ccache --force-clean \