docs(readme): add serverless toolkit link

Author: dkundel

packages/serverless-api/README.md

@@ -1,5 +1,7 @@
 <h1 align="center">@twilio-labs/serverless-api</h1>
-<p align="center">A module to interact with the <a href="https://www.twilio.com/functions">Twilio Serverless</a> API. For example to deploy projects. <br>Full reference documentation at <a href="https://serverless-api.twilio-labs.com">serverless-api.twilio-labs.com</a></p>
+<p align="center">A module to interact with the <a href="https://www.twilio.com/functions">Twilio Serverless</a> API. For example to deploy projects. 
+Part of the <a href="https://github.com/twilio-labs/serverless-toolkit">Serverless Toolkit</a>.
+<br>Full reference documentation at <a href="https://serverless-api.twilio-labs.com">serverless-api.twilio-labs.com</a></p>
 <p align="center">
 <img alt="npm (scoped)" src="https://img.shields.io/npm/v/@twilio-labs/serverless-api.svg?style=flat-square"> <img alt="npm" src="https://img.shields.io/npm/dt/@twilio-labs/serverless-api.svg?style=flat-square"> <img alt="GitHub" src="https://img.shields.io/github/license/twilio-labs/serverless-api.svg?style=flat-square"> <a href="#contributors"><img alt="All Contributors" src="https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square" /></a> <a href="https://github.com/twilio-labs/.github/blob/master/CODE_OF_CONDUCT.md"><img alt="Code of Conduct" src="https://img.shields.io/badge/%F0%9F%92%96-Code%20of%20Conduct-blueviolet.svg?style=flat-square"></a> <a href="http://makeapullrequest.com"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square" alt="PRs Welcome" /></a> </<a>
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