change champion on donation page to Shari

Please change the photo and quote to be Shari's. You can use either photo:

350 px wide: https://www.dropbox.com/s/smzjf2u5956tld8/donate-page-ss-350.png?dl=0 700 px wide: https://www.dropbox.com/s/w5w1tzc7us7ai6i/donate-page-ss-700.png?dl=0

And here is the quote:

"Tor is an essential part of the Internet freedom infrastructure, and I'm looking forward to working with the Tor Project to continue to grow the movement."