Add msisov to ui/ozone WATCHLIST.

Adding myself there to be able to track things easier.

Change-Id: Ia1228e69de4da77630208d12016754086f28b1be
Reviewed-on: https://chromium-review.googlesource.com/1253622Reviewed-by: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Commit-Queue: Maksim Sisov <msisov@igalia.com>
Cr-Commit-Position: refs/heads/master@{#595515}

WATCHLISTS

@@ -2304,6 +2304,7 @@
     'origin_trials': ['chasej+watch@chromium.org',
                       'iclelland+watch@chromium.org'],
     'ozone': ['kalyan.kondapally@intel.com',
+              'msisov@igalia.com',
               'ozone-reviews@chromium.org'],
     'page_info' : ['raymes+watch@chromium.org'],
     'page_load_metrics' : ['bmcquade+watch@chromium.org',