Broken readme link: starting a local testnet

Problem

The Readme section "Starting a local testnet" links to a broken URL: https://docs.solanalabs.com/clusters/benchmark).

Proposed Solution

Not sure what the correct link is

It might be https://docs.solanalabs.com/developing/test-validator, which documents using solana-test-validator. But in the context of the readme just after running ./cargo build and ./cargo test, I'm not sure if it's supposed to be showing how to run the test validator built from source? If that's the case I'm not sure where documentation for that is.