Update bundle (with newest rubocop version) and fix offenses

spec/policies/admin/dashboard_policy_spec.rb

@@ -7,15 +7,15 @@ describe Admin::DashboardPolicy do
 
   permissions :show? do
     it 'grants access to admins' do
-      expect(policy).to permit(FactoryBot.build(:admin), :dashboard)
+      expect(policy).to permit(build(:admin), :dashboard)
     end
 
     it 'does not grant access to teachers' do
-      expect(policy).not_to permit(FactoryBot.build(:teacher), :dashboard)
+      expect(policy).not_to permit(build(:teacher), :dashboard)
     end
 
     it 'does not grant access to external users' do
-      expect(policy).not_to permit(FactoryBot.build(:external_user), :dashboard)
+      expect(policy).not_to permit(build(:external_user), :dashboard)
     end
   end
 end