README: update link to correct documentation

https://bugzilla.gnome.org/show_bug.cgi?id=723335

Signed-off-by: Niv Sardi <xaiki@evilgiggle.com>
Signed-off-by: Thomas Haller <thaller@redhat.com>

README

@@ -23,8 +23,7 @@ edit.
 The database is released under Creative Commons Public Domain (CC-PD).
 
 for more info, see:
-http://live.gnome.org/NetworkManager/MobileBroadband/ServiceProviders
-
+https://wiki.gnome.org/Projects/NetworkManager/MobileBroadband/ServiceProviders
 
 If you are using pkg-config, variable MOBILE_BROADBAND_PROVIDER_INFO contains
 the full path to the database.