[tor-mirrors] Change to existing mirror

[Steve Snyder]

Existing service:

    http://199.175.55.215/

Additional services:

    https://199.175.55.215/
    http://2607:8b00:2::6258:5c9/
    https://2607:8b00:2::6258:5c9/

Please adjust the mirror list accordingly.

Thanks.