[gnome-software/gnome-40] Release version 40.4

[Milan Crha <mcrha src gnome org>]

commit 70c23e4a227551f96c2410f47a2d0f862eb2cb1d
Author: Milan Crha <mcrha redhat com>
Date:   Fri Aug 13 18:05:19 2021 +0200

    Release version 40.4

 NEWS                                           | 11 +++++++++++
 data/appdata/org.gnome.Software.appdata.xml.in | 15 +++++++++++++++
 2 files changed, 26 insertions(+)
---
diff --git a/NEWS b/NEWS
index d2df18dbe..f58eb64f6 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,14 @@
+Version 40.4
+~~~~~~~~~~~~
+Released: 2021-08-13
+
+This is a stable release with the following changes:
+ * flatpak: Improve search of applications
+ * Correct download size for app's runtime
+
+Translation updates:
+ * Occitan (post 1500)
+
 Version 40.3
 ~~~~~~~~~~~~
 Released: 2021-07-09
diff --git a/data/appdata/org.gnome.Software.appdata.xml.in b/data/appdata/org.gnome.Software.appdata.xml.in
index 23f7e3eb9..7d663f6bd 100644
--- a/data/appdata/org.gnome.Software.appdata.xml.in
+++ b/data/appdata/org.gnome.Software.appdata.xml.in
@@ -46,6 +46,21 @@
    Validate with `appstreamcli validate *.appdata.xml`
   -->
   <releases>
+    <release date="2021-08-13" version="40.4" type="stable">
+      <description>
+        <p>
+          This is a stable release with the following changes:
+        </p>
+        <ul>
+          <li>flatpak: Improve search of applications</li>
+          <li>Correct download size for app's runtime</li>
+        </ul>
+        <p>Translation updates:</p>
+        <ul>
+          <li>Occitan (post 1500)</li>
+        </ul>
+      </description>
+    </release>
     <release date="2021-07-09" version="40.3">
       <description>
         <p>