Replace Bugzilla by Gitlab URL in DOAP file

vinagre.doap

@@ -12,7 +12,7 @@
   </description>
   <homepage rdf:resource="https://wiki.gnome.org/Apps/Vinagre" />
   <download-page rdf:resource="http://download.gnome.org/sources/vinagre/" />
-  <bug-database rdf:resource="https://bugzilla.gnome.org/browse.cgi?product=vinagre" />
+  <bug-database rdf:resource="https://gitlab.gnome.org/GNOME/vinagre/issues/" />
 
   <category rdf:resource="http://api.gnome.org/doap-extensions#apps" />
   <programming-language>C</programming-language>