added a link to couscous

closes #155

Author: sofiiako

Strings/String multiplication/task.md

@@ -7,7 +7,7 @@ variable.
 
 <div class="hint">
 
-`"cous"` repeated `2` times gives you `"couscous"`.
+`"cous"` repeated `2` times gives you [`"couscous"`](https://en.wikipedia.org/wiki/Couscous).
 </div>
 
 <div class='hint'>Use multiplication.</div>