[polari] appdata: Update bugtracker URL

[Gitlab System User <gitlab src gnome org>]

commit 4c307b76c0ec22d7b46804ea9a2be8d59997235d
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Oct 23 04:15:56 2017 +0200

    appdata: Update bugtracker URL
    
    While the old bugzilla URL redirects to gitlab, it makes sense to
    just request the correct URL in the first place ...

 data/appdata/org.gnome.Polari.appdata.xml.in | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/appdata/org.gnome.Polari.appdata.xml.in b/data/appdata/org.gnome.Polari.appdata.xml.in
index bedb582..34b6537 100644
--- a/data/appdata/org.gnome.Polari.appdata.xml.in
+++ b/data/appdata/org.gnome.Polari.appdata.xml.in
@@ -38,7 +38,7 @@
     </screenshot>
   </screenshots>
   <url type="homepage">https://wiki.gnome.org/Apps/Polari</url>
-  <url type="bugtracker">https://bugzilla.gnome.org/enter_bug.cgi?product=polari</url>
+  <url type="bugtracker">https://gitlab.gnome.org/GNOME/polari/issues/new</url>
   <url type="donation">http://www.gnome.org/friends/</url>
   <update_contact>fmuellner gnome org</update_contact>
   <project_group>GNOME</project_group>