Add Mastodon follow link

Author: jonakoudijs

README.md

@@ -2,6 +2,7 @@
 [![CodeFactor](https://www.codefactor.io/repository/github/steamcmd/api/badge)](https://www.codefactor.io/repository/github/steamcmd/api)
 [![Code Style](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/python/black)
 [![Discord Online](https://img.shields.io/discord/928592378711912488.svg)](https://discord.steamcmd.net)
+[![Mastodon Follow](https://img.shields.io/mastodon/follow/109302774947550572?domain=https%3A%2F%2Ffosstodon.org&style=flat)](https://fosstodon.org/@steamcmd)
 [![Image Size](https://img.shields.io/docker/image-size/steamcmd/api/latest.svg)](https://hub.docker.com/r/steamcmd/api)
 [![Better Uptime](https://betteruptime.com/status-badges/v1/monitor/ln3p.svg)](https://status.steamcmd.net)
 [![GitHub Release](https://img.shields.io/github/v/release/steamcmd/api?label=version)](https://github.com/steamcmd/api/releases)