Add language to donation page

[dianaluepke]

Either I don't know or don't remember how to do pull requests on the website, as it's saying I need to be working on a branch. So hoping someone can do this for me:

I suggest adding the following language to the Donate page, the line after "Your donation is fully tax-deductible. See About BridgeFoundry for more non-profit details, including our EIN":

"We track all donations on our publicly accessible finance dashboard. If you prefer to have your donation listed as anonymous, please indicate that in the comments field during PayPal checkout or contact us for payments made other ways."

(Link on contact us to finance@bridgefoundry.org)

I can see arguments both ways on whether to link to the actual finance dashboard from that sentence.

[iisa]

@ultrasaurus @ilen please confirm if this is still valid