Update README.md

Author: andreibondarev

README.md

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 Ruby wrapper for the Qdrant vector search database API
 
-![Tests status](https://github.com/andreibondarev/qdrant-ruby/actions/workflows/ci.yml/badge.svg)
+![Tests status](https://github.com/andreibondarev/qdrant-ruby/actions/workflows/ci.yml/badge.svg) [![Gem Version](https://badge.fury.io/rb/qdrant-ruby.svg)](https://badge.fury.io/rb/qdrant-ruby)
 
 ## Installation