Update README.md

README.md

@@ -10,9 +10,10 @@
     <a href="https://github.com/crystal-linux/.github/blob/main/LICENSE"><img src="https://img.shields.io/badge/License-GPL--3.0-blue.svg" alt="License">
     <a href="https://github/crystal-linux/malachite"><img alt="GitHub isses" src="https://img.shields.io/github/issues-raw/crystal-linux/malachite"></a>
     <a href="https://github/crystal-linux/malachite"><img alt="GitHub pull requests" src="https://img.shields.io/github/issues-pr-raw/crystal-linux/malachite"></a><br>
-    <a href="https://twitter.com/intent/user?screen_name=crystal_linux"><img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/crystal_linux?style=flat?color=blue">
     <a href="https://discord.gg/hYJgu8K5aA"><img alt="Discord" src="https://img.shields.io/discord/825473796227858482?color=blue&label=Discord&logo=Discord&logoColor=white"> </a>
-   <a href="https://github.com/ihatethefrench"> <img src="https://img.shields.io/badge/Maintainer-@ihatethefrench-brightgreen" alt="The maintainer of this repository" href="https://github.com/ihatethefrench"></a>
+   <a href="https://github.com/ihatethefrench"> <img src="https://img.shields.io/badge/Maintainer-@ihatethefrench-brightgreen" alt="The maintainer of this repository" href="https://github.com/ihatethefrench"></a><br>
+    <a href="https://fosstodon.org/@crystal_linux"><img alt="Mastodon Follow" src="https://img.shields.io/mastodon/follow/108618426259408142?domain=https%3A%2F%2Ffosstodon.org">
+    <a href="https://twitter.com/crystal_linux"><img alt="Twitter Follow" src="https://img.shields.io/twitter/follow/crystal_linux"></a>
 </p>