Update exercises/concept/remote-control-competition/.docs/hints.md

Co-authored-by: Kah Goh <[email protected]>

Author: jagdish-15

exercises/concept/remote-control-competition/.docs/hints.md

@@ -15,7 +15,7 @@
 ## 3. Allow the production cars to be ranked
 
 - See [this discussion][sort] of sorting.
-- See [this][comparable] for default comparison of objects.
+- See [Comparable's Javadocs][comparable] for default comparison of objects.
 
 [interfaces]: https://docs.oracle.com/javase/tutorial/java/concepts/interface.html
 [sort]: https://docs.oracle.com/javase/7/docs/api/java/util/Collections.html