Swap Gitter badge for GitHub Discussions one in README

Author: iMacTia

README.md

@@ -2,7 +2,7 @@
 
 [![Gem Version](https://badge.fury.io/rb/faraday.svg)](https://rubygems.org/gems/faraday)
 [![GitHub Actions CI](https://github.com/lostisland/faraday/workflows/CI/badge.svg)](https://github.com/lostisland/faraday/actions?query=workflow%3ACI)
-[![Gitter](https://badges.gitter.im/lostisland/faraday.svg)](https://gitter.im/lostisland/faraday?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+[![GitHub Discussions](https://img.shields.io/github/discussions/lostisland/faraday?logo=github)](https://github.com/lostisland/faraday/discussions)
 
 
 Faraday is an HTTP client library that provides a common interface over many