Merge pull request #254 from exercism/253_Broken_help_link_in_setup_file

Fix link for installation and learning resources

SETUP.md

@@ -1,7 +1,7 @@
 * * * *
 
 For installation and learning resources, refer to the
-[exercism help page](http://help.exercism.io/getting-started-with-ruby.html).
+[exercism help page](http://exercism.io/languages/ruby).
 
 For running the tests provided, you will need the Minitest gem. Open a
 terminal window and run the following command to install minitest: