Add bio for kytrinyx entry in maintainer file
Add bio for kytrinyx entry in maintainer file

The question came up yesterday about whether alumni should be featured
on the site, and I think the answer is yes. To give the design team an
example to work with, and to encourage other alumni to submit their's,
I'm adding mine here.

leenipper/xgo,leenipper/xgo,robphoenix/exercism-go,exercism/xgo,robphoenix/exercism-go,exercism/xgo