fix newline type [skip ci]

Author: bbottema

README.md

@@ -1,6 +1,5 @@
 [![APACHE v2 License](https://img.shields.io/badge/license-apachev2-blue.svg?style=flat)](modules/simple-java-mail/LICENSE-2.0.txt) 
-[![Latest Release](https://img.shields.io/maven-central/v/org.simplejavamail/simple-java-mail.svg?style=flat)](https://search.maven.org/#search%7Cgav%7C1%7Cg
-%3A%22org.simplejavamail%22%20AND%20v%3A%226.0.3%22) 
+[![Latest Release](https://img.shields.io/maven-central/v/org.simplejavamail/simple-java-mail.svg?style=flat)](https://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22org.simplejavamail%22%20AND%20v%3A%226.0.3%22) 
 [![Javadocs](https://img.shields.io/badge/javadoc-6.0.3-brightgreen.svg?color=brightgreen)](https://www.javadoc.io/doc/org.simplejavamail/maven-master-project) 
 [![Codacy](https://img.shields.io/codacy/grade/c7506663a4ab41e49b9675d87cd900b7.svg?style=flat)](https://www.codacy.com/app/b-bottema/simple-java-mail)
 ![Java 1.7+](https://img.shields.io/badge/java-1.7+-lightgray.svg)