Add build status badge to readme

README.md

@@ -3,6 +3,7 @@
 [![Latest Release](https://img.shields.io/github/v/release/benbusby/whoogle-search)](https://github.com/benbusby/shoogle/releases)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![tests](https://github.com/benbusby/whoogle-search/actions/workflows/tests.yml/badge.svg)](https://github.com/benbusby/whoogle-search/actions/workflows/tests.yml)
+[![buildx](https://github.com/benbusby/whoogle-search/actions/workflows/buildx.yml/badge.svg)](https://github.com/benbusby/whoogle-search/actions/workflows/buildx.yml)
 [![pep8](https://github.com/benbusby/whoogle-search/workflows/pep8/badge.svg)](https://github.com/benbusby/whoogle-search/actions?query=workflow%3Apep8)
 [![codebeat badge](https://codebeat.co/badges/e96cada2-fb6f-4528-8285-7d72abd74e8d)](https://codebeat.co/projects/github-com-benbusby-shoogle-master)
 [![Docker Pulls](https://img.shields.io/docker/pulls/benbusby/whoogle-search)](https://hub.docker.com/r/benbusby/whoogle-search)