[wip] fix link to code of conduct

Author: russHyde

CONTRIBUTING.md

@@ -44,7 +44,7 @@ contributions. 🎉
 ## Code of Conduct
 
 This project and everyone participating in it is governed by the
-[CURRENT_PROJECT Code of Conduct](COFC_URL).
+[CURRENT_PROJECT Code of Conduct](CODE_OF_CONDUCT.md).
 By participating, you are expected to uphold this code. Please report
 unacceptable behavior to <MAINTAINER>.