Add peletskyi to arc/enterprise owners

BUG=none
TEST=none

Change-Id: I9d883019c615bb2319e9f7f1dc5d8e5e1dae8bff
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526063Reviewed-by: Oleksandr Peletskyi <peletskyi@chromium.org>
Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825308}

chrome/browser/chromeos/arc/enterprise/OWNERS

 bartfab@chromium.org
 edman@chromium.org
 pbond@chromium.org
+peletskyi@chromium.org
 phweiss@chromium.org