Add myself as a "code owner" so that I am assigned a review
automatically:
https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners
I also wanted to add Amnon and Calle, but apparently you need to have
write permissions in order to be a code owner.
The purpose of this automation is to ensure Scylla JMX pull requests
show up in my github.com/pulls page. Thanks Maciej Zimnoch for the tip!
