Transparent Logs and TUF: clarify removing trust

[trishankatdatadog]

From @FiloSottile:

"Also, we think about auditing in terms of trust, rather than just compromise: a major goal for us was to make sure the community wouldn't have to trust Google blindly."

"I think that's what you put under the umbrella of third party auditing and immutable log, but I think of those as means to an end, which is removing trust."