Update README.md

Author: andreibondarev

README.md

@@ -8,7 +8,7 @@
 
 Ruby wrapper for the Weaviate.io API
 
-![Tests status](https://github.com/andreibondarev/weaviate-ruby/actions/workflows/ci.yml/badge.svg)
+![Tests status](https://github.com/andreibondarev/weaviate-ruby/actions/workflows/ci.yml/badge.svg) [![Gem Version](https://badge.fury.io/rb/weaviate-ruby.svg)](https://badge.fury.io/rb/weaviate-ruby)
 
 ## Installation