message: Adding slack badge
diff: -# Serverless Stack Toolkit (SST) [![npm](https://img.shields.io/npm/v/@serverless-stack/cli.svg)](https://www.npmjs.com/package/@serverless-stack/cli) [![Build Status](https://github.com/serverless-stack/serverless-stack/workflows/CI/badge.svg)](https://github.com/serverless-stack/serverless-stack/actions)
  +# Serverless Stack Toolkit (SST) [![Slack](https://img.shields.io/badge/Slack-chat-blue.svg)][slack] [![npm](https://img.shields.io/npm/v/@serverless-stack/cli.svg)](https://www.npmjs.com/package/@serverless-stack/cli) [![Build Status](https://github.com/serverless-stack/serverless-stack/workflows/CI/badge.svg)](https://github.com/serverless-stack/serverless-stack/actions)
  <img alt="Logo" align="right" src="https://raw.githubusercontent.com/serverless-stack/identity/main/sst.svg" width="20%" />
  