Add Cherie to network_session_configurator/OWNERS.

Change-Id: Ib9672cd539310a9712a886fc45f51749021922d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2028175
Auto-Submit: Bence Béky <bnc@chromium.org>
Reviewed-by: Zhongyi Shi <zhongyi@chromium.org>
Commit-Queue: Zhongyi Shi <zhongyi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736459}

components/network_session_configurator/OWNERS

 bnc@chromium.org
 rch@chromium.org
+zhongyi@chromium.org
 # COMPONENT: Internals>Network