Fix presenter spec

spec/presenters/alert_management/alert_presenter_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe AlertManagement::AlertPresenter do
   end
 
   let_it_be(:alert) do
-    build(:alert_management_alert, :with_description, :with_host, :with_service, :with_monitoring_tool, project: project, payload: generic_payload)
+    create(:alert_management_alert, :with_description, :with_host, :with_service, :with_monitoring_tool, project: project, payload: generic_payload)
   end
 
   let(:alert_url) { "http://localhost/#{project.full_path}/-/alert_management/#{alert.iid}/details" }