[website] Add Binance to list of exchanges on BCHA page

Summary: Have received multiple reports that deposits and withdrawals have been enabled, so they can be added back to the list.

Test Plan:
Built and ran site locally, checked link.
I'm relying on third party reports that Binance support for BCHA withdrawals is now working.

Reviewers: majcosta, josephroyking, #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D9288