tor.updateScript: update verification/signing keys
Upstream no longers signs the tarball directly; instead they sign the
sha256sum file[1]. Also, the signing keys have changed, and the
latest release is signed with a key we didn't have before.
[1]: https://gitlab.torproject.org/tpo/web/support/-/commit/dd17604bb3dffa77d6aacdcae52c0c38fee2ea27