exercise_readme.go.tmpl in trackler-2.2.1.108

- old
+ new

@@ -13,9 +13,11 @@
 
 ```bash
 opam install core
 ```
 
+Documentation for Core can be found [here](https://ocaml.janestreet.com/ocaml-core/latest/doc/core/)
+
 To run the tests you will need `OUnit`. Install it using `opam`:
 
 ```bash
 opam install ounit
 ```