Possible Typo in keybase.io/docs/server_security/tracking docs

Step 2: the computer review

> In simplest terms, the Keybase client guarantees that "maria" has access to three things: (1)
> the Keybase account, (2) the twitter account, and (3) the **private key** referenced back in step 1.

(**emphasis mine**)

This should be **public key**, right?

The JSON object in step 1 says the following `keybase_username` has this `public_key`, `twitter_username`, and `twitter_proof`. I get that "maria" should have the private key corresponding to that public key, but isn't that too strong a statement?

Open keybase.io/docs/server_security/tracking and compare the Step 2 wording with the JSON object described in Step 1. Confirm whether “private key” should be “public key,” then update the sentence so it accurately reflects the information established by the proof; the issue is done when the documentation no longer makes the stronger claim.

Written by the indexing model from the issue text.