paperwork: Fix typo in department certification list view

paperwork/views.py

@@ -33,7 +33,9 @@ class MemberCertificationListView(ListView):
 @login_required
 def department_certifications(request):
     if request.user.is_superuser:
-        departments = Department.prefetch_related("shop_lead_flag__members").all()
+        departments = Department.objects.prefetch_related(
+            "shop_lead_flag__members"
+        ).all()
     elif member := Member.from_user(request.user) is not None:
         departments = Department.objects.filter_by_shop_lead(member)
     else: