add missing newline to README

Author: birdayz

README.md

@@ -1,5 +1,6 @@
 # Graal-Javalin Demo
 ![Docker Build Status](https://img.shields.io/docker/build/birdy/graal-javalin.svg)
+
 This sample shows how to build a Javalin microservice and compiling it to native code with GraalVM. I don't expect it to work on anything else than Linux AMD64.
 
 Build either by using Docker and running `docker build .` or directly with Gradle and native-image by running `make build native`.