[FIX] runbot: fix frontend team dashboards again

The previous fix in c9e8e13 was not enough, while preventing a crash
of the view, the view was empty.

runbot/controllers/frontend.py

@@ -516,7 +516,7 @@ def team_dashboards(self, team=None, hide_empty=False, **kwargs):
         qctx = {
             'team': team,
             'teams': teams,
-            'build_assignment_ids': request.env['runbot.build.error'].search(domain, order=order),
+            'assignment_ids': request.env['runbot.build.error'].search(domain, order=order),
             'hide_empty': bool(hide_empty),
             'searchbar_sortings': searchbar_sortings,
             'sortby': sortby,