docs: add beta CI badge to README

Author: mtrezza

README.md

@@ -2,7 +2,8 @@
 
 ---
 
-[![Build Status CI alpha](https://github.com/parse-community/Parse-SDK-JS/workflows/ci/badge.svg?branch=alpha)](https://github.com/parse-community/Parse-SDK-JS/actions?query=workflow%3Aci+branch%3Aalpha)
+[![Build Status CI alpha](https://github.com/parse-community/Parse-SDK-JS/workflows/ci/badge.svg?branch=alpha&subject=alpha)](https://github.com/parse-community/Parse-SDK-JS/actions?query=workflow%3Aci+branch%3Aalpha)
+[![Build Status CI beta](https://github.com/parse-community/Parse-SDK-JS/workflows/ci/badge.svg?branch=beta)](https://github.com/parse-community/Parse-SDK-JS/actions?query=workflow%3Aci+branch%3Abeta)
 [![Build Status CI release](https://github.com/parse-community/Parse-SDK-JS/workflows/ci/badge.svg?branch=release)](https://github.com/parse-community/Parse-SDK-JS/actions?query=workflow%3Aci+branch%3Arelease)
 [![Snyk Badge](https://snyk.io/test/github/parse-community/Parse-SDK-JS/badge.svg)](https://snyk.io/test/github/parse-community/Parse-SDK-JS)
 [![Coverage](http://codecov.io/github/parse-community/Parse-SDK-JS/coverage.svg?branch=alpha)](http://codecov.io/github/parse-community/Parse-SDK-JS?branch=alpha)