Update bundle (with newest rubocop version) and fix offenses

spec/policies/internal_user_policy_spec.rb

@@ -8,9 +8,9 @@ describe InternalUserPolicy do
   %i[create? edit? index? new? show? update?].each do |action|
     permissions(action) do
       it 'grants access to admins only' do
-        expect(policy).to permit(FactoryBot.build(:admin), InternalUser.new)
+        expect(policy).to permit(build(:admin), InternalUser.new)
         %i[external_user teacher].each do |factory_name|
-          expect(policy).not_to permit(FactoryBot.build(factory_name), InternalUser.new)
+          expect(policy).not_to permit(build(factory_name), InternalUser.new)
         end
       end
     end
@@ -20,16 +20,16 @@ describe InternalUserPolicy do
     context 'with an admin user' do
       it 'grants access to no one' do
         %i[admin external_user teacher].each do |factory_name|
-          expect(policy).not_to permit(FactoryBot.build(factory_name), FactoryBot.build(:admin))
+          expect(policy).not_to permit(build(factory_name), build(:admin))
         end
       end
     end
 
     context 'with a non-admin user' do
       it 'grants access to admins only' do
-        expect(policy).to permit(FactoryBot.build(:admin), InternalUser.new)
+        expect(policy).to permit(build(:admin), InternalUser.new)
         %i[external_user teacher].each do |factory_name|
-          expect(policy).not_to permit(FactoryBot.build(factory_name), FactoryBot.build(:teacher))
+          expect(policy).not_to permit(build(factory_name), build(:teacher))
         end
       end
     end