Updating top-level OWNERS.

Change-Id: I061df17a2bb713b00c09104c1b7fcfad218b8ad6
Reviewed-on: https://chromium-review.googlesource.com/1126929Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54268}

OWNERS

@@ -24,6 +24,7 @@ leszeks@chromium.org
 machenbach@chromium.org
 marja@chromium.org
 mlippautz@chromium.org
+mslekova@chromium.org
 mstarzinger@chromium.org
 mvstanton@chromium.org
 mythria@chromium.org