Broken mailto: link

When a build fails we provide the following message:

"If you continue to get stuck, we suggest checking out our docs and/or our community site. As this project builds under a paid plan, you may also contact engineering support to ask for help. Thanks!"

A user reports:

This links to mailto:CircleCI Support <sayhi@circleci.com> - it looks like modern Chrome (at least) doesn’t support the full range of email addresses in mailto urls, only localpart@domain

We should fix this to only link to support@circleci.com