Update supported Ratpack version in README
@@ -44,7 +44,7 @@ to capture telemetry from a number of popular libraries and frameworks.
| [Play WS](https://github.com/playframework/play-ws) | 1.0+ |
| [Project Reactor](https://github.com/reactor/reactor-core) | 3.1+ |
| [RabbitMQ Client](https://github.com/rabbitmq/rabbitmq-java-client) | 2.7+ |
-| [Ratpack](https://github.com/ratpack/ratpack) | 1.4+ |
+| [Ratpack](https://github.com/ratpack/ratpack) | 1.5+ |
| [RMI](https://docs.oracle.com/en/java/javase/11/docs/api/java.rmi/java/rmi/package-summary.html) | Java 7+ |
| [RxJava](https://github.com/ReactiveX/RxJava) | 1.0+ |
| [Servlet](https://javaee.github.io/javaee-spec/javadocs/javax/servlet/package-summary.html) | 2.3+ |
