[gnome-documents] Add a missing tag to the AppData file

[Richard Hughes <rhughes src gnome org>]

commit fc4fe8566ec78ecd9ea9e30acdb129c361df8687
Author: Richard Hughes <richard hughsie com>
Date:   Mon Jan 25 15:22:20 2016 +0000

    Add a missing tag to the AppData file

 data/org.gnome.Documents.appdata.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.Documents.appdata.xml.in b/data/org.gnome.Documents.appdata.xml.in
index a0b6c00..df706ae 100644
--- a/data/org.gnome.Documents.appdata.xml.in
+++ b/data/org.gnome.Documents.appdata.xml.in
@@ -46,4 +46,5 @@
     </screenshot>
   </screenshots>
   <project_group>GNOME</project_group>
+  <translation type="gettext">gnome-documents</translation>
 </application>