Update code of conduct to use Springload email (#38)

I must have missed the reference to Wagtail's when setting up the repository.

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 <hello@wagtail.io>. All
+reported by contacting the project team at <hello@springload.co.nz>. 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.