Modify CoC contact section

I couldn't find an email address to use, so reverted to something
similar to previous version's contact method.

[ci skip]

CODE_OF_CONDUCT.md

@@ -55,7 +55,7 @@ further defined and clarified by project maintainers.
 ## Enforcement
 
 Instances of abusive, harassing, or otherwise unacceptable behavior may be
-reported by contacting the project team at [INSERT EMAIL ADDRESS]. All
+reported by opening an issue or contacting the project maintainers. All
 complaints will be reviewed and investigated and will result in a response that
 is deemed necessary and appropriate to the circumstances. The project team is
 obligated to maintain confidentiality with regard to the reporter of an incident.