[gnome-boxes] flatpak: Use "main" branch for osinfo-db

[Felipe Borges <felipeborges src gnome org>]

commit b594358b9fd945db9279d45a7b0607fb25e57f31
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Sep 5 14:28:18 2022 +0200

    flatpak: Use "main" branch for osinfo-db
    
    https://gitlab.com/libosinfo/osinfo-db/-/issues/83

 build-aux/flatpak/org.gnome.BoxesDevel.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.BoxesDevel.json b/build-aux/flatpak/org.gnome.BoxesDevel.json
index 009ab5c2..98997c9e 100644
--- a/build-aux/flatpak/org.gnome.BoxesDevel.json
+++ b/build-aux/flatpak/org.gnome.BoxesDevel.json
@@ -370,7 +370,8 @@
                     "sources": [
                         {
                             "type": "git",
-                            "url": "https://gitlab.com/libosinfo/osinfo-db.git";
+                            "url": "https://gitlab.com/libosinfo/osinfo-db.git";,
+                            "branch": "main"
                         }
                     ]
                 }