OWNERS: Update Andrew's preferred email

We're having some grief with non-preferred emails in Gerrit[1]. I now
prefer project-related content goes to my work email address, so use my
non-preferred email to implement the switch.

[1]: https://issues.gerritcodereview.com/issues/317345953

Change-Id: I1e17c560fd170304229c634f560dec59528e6e41
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
2 files changed