[gnome-software/wjt/flatpak-ostree-main-branch] flatpak: Update OSTree branch name

[Will Thompson <wjt src gnome org>]

commit 85a6e3c2f701e890fa9e8c163bb73f7660b1c0dc
Author: Will Thompson <wjt endlessos org>
Date:   Tue May 18 11:34:59 2021 +0100

    flatpak: Update OSTree branch name
    
    OSTree has renamed its development branch from 'master' to 'main'. They
    have kept the 'master' branch around for the benefit of tools that
    require pinned commits to be on the 'master' branch, but removed all
    content from that branch.
    
    As a result of this change, this Flatpak build fails, at least on my
    system which had an existing checkout of the 'master' branch. I suspect
    that on a new checkout, flatpak-builder would respect the server's
    default branch, but being explicit here does not cause harm.
    
    Explicitly specify the 'branch' as 'main' for the ostree module.
    
    https://github.com/ostreedev/ostree/pull/2358
    https://github.com/ostreedev/ostree/issues/2360

 contrib/org.gnome.SoftwareDevel.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/contrib/org.gnome.SoftwareDevel.json b/contrib/org.gnome.SoftwareDevel.json
index e646eae7f..56f0f1fc8 100644
--- a/contrib/org.gnome.SoftwareDevel.json
+++ b/contrib/org.gnome.SoftwareDevel.json
@@ -156,7 +156,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://github.com/ostreedev/ostree.git";
+                    "url": "https://github.com/ostreedev/ostree.git";,
+                    "branch": "main"
                 }
             ]
         },