Add reference to javamelody starter

Closes spring-projectsgh-12877

Author: evernat

spring-boot-project/spring-boot-starters/README.adoc

@@ -106,6 +106,9 @@ do as they were designed before this was clarified.
 | https://github.com/neuland/jade4j[Jade Templates] (Jade4J)
 | https://github.com/domix/spring-boot-starter-jade4j
 
+| https://github.com/javamelody/javamelody/wiki[JavaMelody] monitoring
+| https://github.com/javamelody/javamelody/wiki/SpringBootStarter
+
 | https://github.com/sbraconnier/jodconverter[JODConverter]
 | https://github.com/sbraconnier/jodconverter