[e.cash] Tell people not to use Tor for avalanche staking nodes

Summary: There is a staker is using Tor, this should be discouraged.

Test Plan: Ran the site locally, page looks good.

Reviewers: Fabien, #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D14936