docs(readme): Add badge for Cirrus / FreeBSD builds

README.md

@@ -1,8 +1,9 @@
+[![Actions Build Status](https://img.shields.io/github/workflow/status/sile-typesetter/sile/Build?label=Actions%20Build&logo=Github)](https://github.com/sile-typesetter/sile/actions?workflow=Build)
 [![Travis Build Status](https://img.shields.io/travis/sile-typesetter/sile?label=Travis%20Build&logo=Travis)](https://travis-ci.com/sile-typesetter/sile)
-[![Actions Build Status](https://img.shields.io/github/workflow/status/sile-typesetter/sile/Build?label=Build&logo=Github)](https://github.com/sile-typesetter/sile/actions?workflow=Build)
-[![Azure Build Status](https://img.shields.io/azure-devops/build/sile-typesetter/069c3e31-ee59-4bd6-b395-1f1059acd8db/1?label=Azure%20Build&logo=Azuredevops)](https://dev.azure.com/sile-typesetter/sile/_build/latest?definitionId=1&branchName=master)
 [![Docker Build Status](https://img.shields.io/docker/cloud/build/siletypesetter/sile?label=Docker%20Build&logo=Docker)](https://hub.docker.com/repository/docker/siletypesetter/sile/builds)
-[![Luacheck Lint Status](https://img.shields.io/github/workflow/status/sile-typesetter/sile/Luacheck?label=Luacheck&logo=Github)](https://github.com/sile-typesetter/sile/actions?workflow=Luacheck)
+[![Cirrus Build Status](https://img.shields.io/cirrus/github/sile-typesetter/sile?logo=freebsd)](https://cirrus-ci.com/github/sile-typesetter/sile/master)<br />
+[![Azure Build Status](https://img.shields.io/azure-devops/build/sile-typesetter/069c3e31-ee59-4bd6-b395-1f1059acd8db/1?label=Azure%20Build&logo=Azuredevops)](https://dev.azure.com/sile-typesetter/sile/_build/latest?definitionId=1&branchName=master)
+[![Luacheck Lint Status](https://img.shields.io/github/workflow/status/sile-typesetter/sile/Luacheck?label=Luacheck&logo=Lua)](https://github.com/sile-typesetter/sile/actions?workflow=Luacheck)
 [![Coveralls Coverage Status](https://img.shields.io/coveralls/github/sile-typesetter/sile?label=Coverage&logo=Coveralls)](https://coveralls.io/github/sile-typesetter/sile?branch=master)<br />
 [![Chat on Gitter](https://img.shields.io/gitter/room/simoncozens/sile?color=blue&label=Chat&logo=Gitter)](https://gitter.im/simoncozens/sile?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-blue.svg)](https://conventionalcommits.org)