[tracker/sam/doap-list] doap: Remove mailing list and point to developer-forum

[Sam Thursfield <sthursfield src gnome org>]

commit 023183dc1552c76b5253c7061e9b2909bf20bf6a
Author: Sam Thursfield <sam afuera me uk>
Date:   Sun Sep 20 00:56:51 2020 +0200

    doap: Remove mailing list and point to developer-forum
    
    See https://discourse.gnome.org/t/doap-and-discourse-instead-of-a-mailing-list/4267

 tracker.doap | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tracker.doap b/tracker.doap
index 945e9518c..b6038ffc2 100644
--- a/tracker.doap
+++ b/tracker.doap
@@ -15,7 +15,7 @@ big benefits for the user; shared data between applications and
 information which is relational to other information (for example:
 mixing contacts with files, locations, activities and etc.).</description>
   <homepage rdf:resource="https://wiki.gnome.org/Projects/Tracker"; />
-  <mailing-list rdf:resource="http://mail.gnome.org/mailman/listinfo/tracker-list"; />
+  <developer-forum rdf:resource="https://discourse.gnome.org/tag/tracker"; />
   <download-page rdf:resource="http://download.gnome.org/sources/tracker/"; />
   <bug-database rdf:resource="https://gitlab.gnome.org/GNOME/tracker/issues/"; />
   <category rdf:resource="http://api.gnome.org/doap-extensions#core"; />