[documentation]maven artifactId  jooby-caffeine-cache missing, it is jooby-caffeine

In the documentation page (http://jooby.org/doc/caffeine/), dependency section,

<dependency>
 <groupId>org.jooby</groupId>
 <artifactId>jooby-caffeine-cache</artifactId>
 <version>1.1.1</version>
</dependency>

should be:

<dependency>
 <groupId>org.jooby</groupId>
 <artifactId>jooby-caffeine</artifactId>
 <version>1.1.1</version>
</dependency>