Please update content on SDV Contribution Day event page

Here is the final update to the event website. Since we are sending info out to the onsite attendees soon, we would really appreciate if this could be done quickly. It's just a few items and I hope it's quick. Thanks so much!

Here is the part of the Gdoc with the requested updates:

https://docs.google.com/document/d/1m6X0I436tZRq_FlVGW4EYx2WQ65tmwi_cRSxVz1YlEc/edit#heading=h.cy0spq7eq7q

Attaching the photo for the new speaker as well.

FYI @mplagge