Add release badge

Author: ottaviano

README.md

@@ -1,6 +1,7 @@
 # Gravatar image provider for Faker
 
 [![Tests](https://github.com/ottaviano/faker-gravatar/actions/workflows/tests.yaml/badge.svg?branch=master)](https://github.com/ottaviano/faker-gravatar/actions/workflows/tests.yaml)
+[![Latest Version](https://img.shields.io/github/release/ottaviano/faker-gravatar.svg?style=flat-square)](https://github.com/ottaviano/faker-gravatar/releases)
 
 It is [Gravatar](https://en.gravatar.com/site/implement/images/) image provider for [fzaninotto/Faker](https://github.com/fzaninotto/Faker)