Fix height of discord badge

Author: 7h3kk1d

README.md

@@ -2,7 +2,7 @@
 ======
 [![Actions Status](https://github.com/palatable/lambda/workflows/Java%20CI/badge.svg)](https://github.com/palatable/lambda/actions)
 [![Lambda](https://img.shields.io/maven-central/v/com.jnape.palatable/lambda.svg)](http://search.maven.org/#search%7Cga%7C1%7Ccom.jnape.palatable.lambda)
-[![Join the chat on Discord](https://dcbadge.vercel.app/api/server/wR7k8RAKM5)](https://discord.gg/wR7k8RAKM5)
+[<img src="https://dcbadge.vercel.app/api/server/wR7k8RAKM5" height=20 alt="Join the chat on Discord" />](https://discord.gg/wR7k8RAKM5)
 [![Floobits Status](https://floobits.com/jnape/lambda.svg)](https://floobits.com/jnape/lambda/redirect)
 
 Functional patterns for Java