[gnumeric] Add a missing tag to the AppData file

[Richard Hughes <rhughes src gnome org>]

commit 9da0c32485a2437cfcf2bcfc5d01c5669ef1b634
Author: Richard Hughes <richard hughsie com>
Date:   Mon Jan 25 13:10:55 2016 +0000

    Add a missing tag to the AppData file

 gnumeric.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gnumeric.appdata.xml.in b/gnumeric.appdata.xml.in
index 17f17e9..f6730f3 100644
--- a/gnumeric.appdata.xml.in
+++ b/gnumeric.appdata.xml.in
@@ -19,4 +19,5 @@ files with Microsoft Excel and programs supporting the ODS standard.</_p>
     <kudo>HiDpiIcon</kudo>
     <kudo>ModernToolkit</kudo>
   </kudos>
+  <project_group>GNOME</project_group>
 </application>