FIX: regular users can't access wizard with guest permissions

lib/custom_wizard/wizard.rb

@@ -230,6 +230,7 @@ class CustomWizard::Wizard
         m[:type] === 'assignment' && [*m[:result]].include?(GUEST_GROUP_ID)
       else
         if m[:type] === 'assignment'
+          [*m[:result]].include?(GUEST_GROUP_ID) ||
           [*m[:result]].include?(Group::AUTO_GROUPS[:everyone]) ||
           GroupUser.exists?(group_id: m[:result], user_id: user.id)
         elsif m[:type] === 'validation'

spec/components/custom_wizard/wizard_spec.rb

@@ -6,11 +6,14 @@ describe CustomWizard::Wizard do
   fab!(:admin_user) { Fabricate(:user, admin: true) }
   let(:template_json) { get_wizard_fixture("wizard") }
   let(:permitted_json) { get_wizard_fixture("wizard/permitted") }
+  let(:guests_permitted_json) { get_wizard_fixture("wizard/guests_permitted") }
 
   before do
     Group.refresh_automatic_group!(:trust_level_3)
     @permitted_template = template_json.dup
     @permitted_template["permitted"] = permitted_json["permitted"]
+    @guests_permitted_template = template_json.dup
+    @guests_permitted_template["permitted"] = guests_permitted_json["permitted"]
     @wizard = CustomWizard::Wizard.new(template_json, user)
   end
 
@@ -128,6 +131,9 @@ describe CustomWizard::Wizard do
       expect(
         CustomWizard::Wizard.new(@permitted_template, trusted_user).permitted?
       ).to eq(true)
+      expect(
+        CustomWizard::Wizard.new(@guests_permitted_template, trusted_user).permitted?
+      ).to eq(true)
     end
 
     it "permits everyone if everyone is permitted" do