[gnome-photos/wip/rishi/tracker-switch-to-2.3] flatpak: Fix the tracker and tracker-miner builds

[Debarshi Ray <debarshir src gnome org>]

commit 66093c07f9d42b9d20be5b3ae5d3638658abd95a
Author: Debarshi Ray <debarshir gnome org>
Date:   Mon Mar 30 15:20:28 2020 +0200

    flatpak: Fix the tracker and tracker-miner builds
    
    See:
    https://discourse.gnome.org/t/tracker-has-branched-for-3-0-use-the-2-3-branch-if-you-want-stability/1889

 flatpak/org.gnome.Photos.json | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index ec9f9c73..528e9723 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -256,7 +256,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/tracker.git";
+                    "url": "https://gitlab.gnome.org/GNOME/tracker.git";,
+                    "branch": "tracker-2.3"
                 }
             ]
         },
@@ -284,7 +285,8 @@
             "sources": [
                 {
                     "type": "git",
-                    "url": "https://gitlab.gnome.org/GNOME/tracker-miners.git";
+                    "url": "https://gitlab.gnome.org/GNOME/tracker-miners.git";,
+                    "branch": "tracker-miners-2.3"
                 }
             ]
         },