Add Matthias and Sven as new Gerrit maintainers

Matthias Sohn and Sven Selberg have been elected as Gerrit maintainers
[1,2].

[1] https://groups.google.com/g/gerritcodereview-maintainers/c/HEFUTHgd9uE/m/qMOZrjFDBgAJ
[2] https://groups.google.com/g/gerritcodereview-maintainers/c/91qhDVh_d_8/m/PwHrvwFDBgAJ

Signed-off-by: Edwin Kempin <ekempin@google.com>
Change-Id: I6d45b6e1cb8cea8df8e7f72f700a9be379de0973
1 file changed