[gnome-boxes] Flatpak: update qemu point release

[Felipe Borges <felipeborges src gnome org>]

commit ac51327882729042e229df9aa3d0bc72639591f6
Author: Jordan Petridis <jordan centricular com>
Date:   Thu Jul 9 14:58:37 2020 +0300

    Flatpak: update qemu point release

 build-aux/flatpak/org.gnome.Boxes.json | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/build-aux/flatpak/org.gnome.Boxes.json b/build-aux/flatpak/org.gnome.Boxes.json
index 3c92a9f8..8c754873 100644
--- a/build-aux/flatpak/org.gnome.Boxes.json
+++ b/build-aux/flatpak/org.gnome.Boxes.json
@@ -392,8 +392,8 @@
             "sources" : [
                 {
                     "type" : "archive",
-                    "url" : "https://download.qemu.org/qemu-4.2.0.tar.xz";,
-                    "sha256" : "d3481d4108ce211a053ef15be69af1bdd9dde1510fda80d92be0f6c3e98768f0"
+                    "url" : "https://download.qemu.org/qemu-4.2.1.tar.xz";,
+                    "sha256" : "7e331163b72e7bcf63bd35cb85cba87b48d12fab3f264b94c23f7d3991094207"
                 }
             ]
         },