Fix the badge.
-JSON Schema Test Suite [![Build Status](https://travis-ci.org/json-schema-org/JSON-Schema-Test-Suite.svg?branch=master)](https://travis-ci.org/json-schema-org/JSON-Schema-Test-Suite)
+JSON Schema Test Suite [![Build Status](https://github.com/json-schema-org/JSON-Schema-Test-Suite/workflows/Test%20Suite%20Sanity%20Checking/badge.svg)](https://github.com/json-schema-org/JSON-Schema-Test-Suite/actions?query=workflow%3A%22Test+Suite+Sanity+Checking%22)
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This repository contains a set of JSON objects that implementors of JSON Schema
