[gnome-builder] build: tag ostree v2022.2

[Christian Hergert <chergert src gnome org>]

commit a8882acf9f5a94ad9e87cccd459f627ad57f7612
Author: Christian Hergert <chergert redhat com>
Date:   Thu Apr 7 10:14:05 2022 -0700

    build: tag ostree v2022.2

 build-aux/flatpak/org.gnome.Builder.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build-aux/flatpak/org.gnome.Builder.json b/build-aux/flatpak/org.gnome.Builder.json
index 6044cec9f..94de4eef4 100644
--- a/build-aux/flatpak/org.gnome.Builder.json
+++ b/build-aux/flatpak/org.gnome.Builder.json
@@ -441,7 +441,7 @@
                 {
                     "type" : "git",
                     "url" : "https://github.com/ostreedev/ostree.git";,
-                    "branch" : "main"
+                    "tag" : "v2022.2"
                 }
             ]
         },