Update CODE_OF_CONDUCT.md

Fixes (Lab Editor review)[carpentries-lab/reviews#36] mention that "Link to 'reporting guidelines' in Code of Conduct file is broken - should be https://docs.carpentries.org/policies/coc/incident-reporting.html"

Author: chennesy

CODE_OF_CONDUCT.md

@@ -9,5 +9,5 @@ Instances of abusive, harassing, or otherwise unacceptable behavior
 may be reported by following our [reporting guidelines][coc-reporting].
 
 
-[coc-reporting]: https://docs.carpentries.org/topic_folders/policies/incident-reporting.html
+[coc-reporting]: https://docs.carpentries.org/policies/coc/incident-reporting.html
 [coc]: https://docs.carpentries.org/topic_folders/policies/code-of-conduct.html