add release badge

Author: GrantBirki

README.md

@@ -4,6 +4,7 @@
 [![test](https://github.com/github/hooks/actions/workflows/test.yml/badge.svg)](https://github.com/github/hooks/actions/workflows/test.yml)
 [![lint](https://github.com/github/hooks/actions/workflows/lint.yml/badge.svg)](https://github.com/github/hooks/actions/workflows/lint.yml)
 [![integration](https://github.com/github/hooks/actions/workflows/integration.yml/badge.svg)](https://github.com/github/hooks/actions/workflows/integration.yml)
+[![release](https://github.com/github/hooks/actions/workflows/release.yml/badge.svg)](https://github.com/github/hooks/actions/workflows/release.yml)
 
 A Pluggable Webhook Server Framework written in Ruby.