message: Fix: `purser-trezor` readme link
diff: ## [@colony/](https://www.npmjs.com/org/colony)purser-trezor
  -A `javascript` library to interact with a [Trezor](https://www.ledger.com/) based ethereum wallet.
  +A `javascript` library to interact with a [Trezor](https://trezor.io/) based ethereum wallet.
  It extracts all the complexity from setting up, maintaining and interacting with it, while providing you with a [predictable interface](https://docs.colony.io/purser/api-wallet-object/).
  