'code of conduct' - under Contributor Agreement section
'creating an issue' - under How to contribute section
'https://github.com/swcarpentry/FIXME' - both the links referencing this website in the first numbered point under the Where to Contribute section
'bug reports' - under What to Contribute section
'list of issue for this repository' - under What to Contribute section
'master repository' - Both the references under the Using Github section
'discussion mailing list' - Not sure if it broken but goes to a blank page with 'No route defined for this request...' in an empty box and clicking the Back home box didn't reroute.
Here are set of broken links on this page: