MAINTAINERS: Cover qapi/stats.json

Commit aa09b3d5f8e (stats: Move QMP commands from monitor/ to stats/)
created section Stats, but neglected to add qapi/stats.json to it.
Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
1 file changed