The EV industry's growth is slowing, but Rivian investors have a little good news to dig into.Considering Rivian Automotive (RIVN -2.25%) is dealing with a second-quarter planned plant shutdown, stalling production and delivery estimates for the year, and slowing demand, you might not think there's much good news to be found surrounding the young electric vehicle (EV) maker.But you'd be wrong. Let's dig into a couple of recent announcements that are certainly positive for the company.Incentive packageIn a p ...