Broken mater due to static-analysis

Job #1162346971 failed for 297a5319:

Offenses:
ee/spec/services/ee/notification_service_spec.rb:902:7: C: RSpec/EmptyLineAfterFinalLetItBe: Add an empty line after the last let_it_be.
      let_it_be(:project) { alert.project }
      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^