[gnome-games/gnome-3-28] appdata: Use correct metadata license tag

[Alexander Mikhaylenko <alexm src gnome org>]

commit a1476d5af2f9b24420c73b296dcd2e956ae89a26
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Tue Aug 21 08:26:48 2018 -0400

    appdata: Use correct metadata license tag
    
    Closes: https://gitlab.gnome.org/GNOME/gnome-games/issues/77

 data/org.gnome.Games.appdata.xml.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.Games.appdata.xml.in b/data/org.gnome.Games.appdata.xml.in
index e0fcb046..068a945c 100644
--- a/data/org.gnome.Games.appdata.xml.in
+++ b/data/org.gnome.Games.appdata.xml.in
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <application>
   <id type="desktop">org.gnome.Games.desktop</id>
-  <licence>CC0-1.0</licence>
+  <metadata_license>CC0-1.0</metadata_license>
   <project_license>GPL-3.0+</project_license>
   <_name>Games</_name>
   <_summary>Simple game launcher for GNOME</_summary>