Add rsorokin@ to c/b/chromeos/login/OWNERS

Bug: none
Change-Id: Ic0f05310a37d5de634e46e7f19d9d6642902732a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1807505
Auto-Submit: Roman Sorokin [CET] <rsorokin@chromium.org>
Commit-Queue: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697541}

chrome/browser/chromeos/login/OWNERS

@@ -6,5 +6,6 @@ xiyuan@chromium.org
 
 # (in CET)
 antrim@chromium.org
+rsorokin@chromium.org
 
 # COMPONENT: UI>Shell>OOBE