Add updated IoT Membership Prospectus to the website

We made a few minor updates to the IoT Membership Prospectus and would like to make sure we are using the latest version on the website and anywhere else it is posted. The Google Slides can be found here: https://docs.google.com/presentation/d/1jC7GaUmUE6wncSDcrZI9uVY3U2-FT0FmlhkaG_PDtrw/edit#slide=id.ge1a298c6b7_0_0