rename User.is_subscriber_viewable => User.is_viewable

com/views.py

@@ -243,7 +243,7 @@ class NewsListView(TemplateView):
             User.objects.filter(
                 date_of_birth__month=localdate().month,
                 date_of_birth__day=localdate().day,
-                is_subscriber_viewable=True,
+                is_viewable=True,
             )
             .filter(role__in=["STUDENT", "FORMER STUDENT"])
             .order_by("-date_of_birth"),