chore(cli): update documentation to include Arazzo (#2686)

* chore(cli): update documentation to include Arazzo

* chore(repo): update readme header image

packages/cli/README.md

@@ -2,7 +2,7 @@
 [![CircleCI](https://img.shields.io/circleci/build/github/stoplightio/spectral/develop)](https://circleci.com/gh/stoplightio/spectral) [![NPM Downloads](https://img.shields.io/npm/dw/@stoplight/spectral-cli?color=blue)](https://www.npmjs.com/package/@stoplight/spectral-cli) [![Stoplight Forest](https://img.shields.io/ecologi/trees/stoplightinc)][stoplight_forest]
 
 - **Custom Rulesets**: Create custom rules to lint JSON or YAML objects
-- **Ready-to-use Rulesets**: Validate and lint **OpenAPI v2 & v3** and **AsyncAPI** Documents
+- **Ready-to-use Rulesets**: Validate and lint **OpenAPI v2 & v3.x**, **AsyncAPI**, and **Arazzo v1** Documents
 - **JSON Path Support**: Use JSON path to apply rules to specific parts of your objects
 - **Ready-to-use Functions**: Built-in set of functions to help [create custom rules](https://meta.stoplight.io/docs/spectral/docs/guides/4-custom-rulesets.md#adding-rules). Functions include pattern checks, parameter checks, alphabetical ordering, a specified number of characters, provided keys are present in an object, etc.
 - **Custom Functions**: Create custom functions for advanced use cases
@@ -64,7 +64,7 @@ No problem! A hosted version of Spectral comes **free** with the Stoplight platf
 
 ### What is the difference between Spectral and Speccy
 
-[Speccy](https://github.com/wework/speccy) was a great inspiration for Spectral, but was designed to work only with OpenAPI v3. Spectral can apply rules to _any_ JSON/YAML object (including OpenAPI v2/v3 and AsyncAPI). It's mostly been abandoned now, and is JavaScript not TypeScript.
+[Speccy](https://github.com/wework/speccy) was a great inspiration for Spectral, but was designed to work only with OpenAPI v3. Spectral can apply rules to _any_ JSON/YAML object (including OpenAPI v2/v3, Arazzo, and AsyncAPI). Speccy has mostly been abandoned now, and is JavaScript not TypeScript.
 
 ## ⚙️ Integrations
 

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@stoplight/spectral-cli",
-  "version": "6.12.0",
+  "version": "6.12.1",
   "homepage": "https://github.com/stoplightio/spectral",
   "bugs": "https://github.com/stoplightio/spectral/issues",
   "author": "Stoplight <support@stoplight.io>",