Add ishell@ and verwaest@ to src/init/OWNERS

Bug: v8:9247
Change-Id: If3af83b241481e620d4ef05d6608864cea75640f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1648475
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62037}

src/init/OWNERS

 ahaas@chromium.org
 bmeurer@chromium.org
-jkummerow@chromium.org
-jgruber@chromium.org
-yangguo@chromium.org
-gsathya@chromium.org
 ftang@chromium.org
+gsathya@chromium.org
+ishell@chromium.org
+jgruber@chromium.org
+jkummerow@chromium.org
 marja@chromium.org
 mathias@chromium.org
 ulan@chromium.org
+verwaest@chromium.org
+yangguo@chromium.org
 
 # COMPONENT: Blink>JavaScript>Runtime