[gnome-font-viewer] appdata: Add closing release tag

[Jeremy Bicha <jbicha src gnome org>]

commit 42c9984736dbba6abf118c0db3c1a3d8456cb68e
Author: Jeremy Bicha <jbicha debian org>
Date:   Mon Oct 1 22:15:25 2018 -0400

    appdata: Add closing release tag

 data/org.gnome.font-viewer.appdata.xml.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/org.gnome.font-viewer.appdata.xml.in b/data/org.gnome.font-viewer.appdata.xml.in
index 9dfcd20..e5af962 100644
--- a/data/org.gnome.font-viewer.appdata.xml.in
+++ b/data/org.gnome.font-viewer.appdata.xml.in
@@ -41,6 +41,7 @@
           <li>Translation updates</li>
         </ul>
       </description>
+    </release>
     <release version="3.28.0" date="2018-03-13">
       <description>
         <ul>