[gnome-music/gnome-3-28] flatpak: Use 3.28 runtime

[Marinus Schraal <mschraal src gnome org>]

commit 7d86fd405470bdaefc8a47d59e1fbc58118e63ae
Author: Marinus Schraal <mschraal gnome org>
Date:   Tue Mar 20 00:14:34 2018 +0100

    flatpak: Use 3.28 runtime

 org.gnome.Music.json | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/org.gnome.Music.json b/org.gnome.Music.json
index ca36af65..a5339cd2 100644
--- a/org.gnome.Music.json
+++ b/org.gnome.Music.json
@@ -1,11 +1,13 @@
 {
     "app-id": "org.gnome.Music",
     "runtime": "org.gnome.Platform",
-    "runtime-version": "master",
+    "runtime-version": "3.28",
     "sdk": "org.gnome.Sdk",
     "command": "gnome-music",
-    "tags": ["nightly"],
-    "desktop-file-name-prefix": "(Nightly) ",
+    "tags": [
+        "stable",
+        "3.28"
+    ],
     "finish-args": [
         "--share=ipc", "--socket=x11",
         "--share=network",