Update README.md

Author: andreibondarev

README.md

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 # GooglePalmApi
 
-TODO: Delete this and the text below, and describe your gem
+Ruby API client for the Google PaLM APIs.
+
+![Tests status](https://github.com/andreibondarev/google_palm_api/actions/workflows/ci.yml/badge.svg) [![Gem Version](https://badge.fury.io/rb/google_palm_api.svg)](https://badge.fury.io/rb/google_palm_api)
 
-Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/google_palm_api`. To experiment with that code, run `bin/console` for an interactive prompt.
 
 ## Installation