* Add email next to my github handle

Following Governance description, I add my email next to my github handle.

I would need for CNCF Graduation to show the different organizations the maintainers are from. Anyone with no email or personal email (like gmail) will be considered under its own organization.

That would also help when vote will come-in, as we restraint votes for people on the same organization.

@miekg :
* I guess that will need change in the dreck project that parse this file.
* Do you want me to PR the change on that project (miek/dreck) ?

* Update with a comment
Co-Authored-By: fturib <ftur@infoblox.com>