Add link to the library

README.md

@@ -71,4 +71,4 @@ If you want to mark an entire request as "errored", then combine this with `root
 
 ### Tracing carmine
 
-You can enable tracing for the carmine Redis library by using `sleepy.dog.carmine/trace-carmine!`. The traces will be reported mimicking the way how Datadog auto-instruments Jedis or the Ruby redis gem.
+You can enable tracing for the [carmine Redis library](https://github.com/taoensso/carmine) by using `sleepy.dog.carmine/trace-carmine!`. The traces will be reported mimicking the way how Datadog auto-instruments Jedis or the Ruby redis gem.