feedback: Add iby to OWNERS.

BUG=N/A
TEST=N/A

Change-Id: Id28dc53a9265fba56f1cd1b9a6879a1208b55ff1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2036650Reviewed-by: J Kardatzke <jkardatzke@chromium.org>
Reviewed-by: Ian Barkley-Yeung <iby@chromium.org>
Commit-Queue: Miriam Zimmerman <mutexlox@chromium.org>
Cr-Commit-Position: refs/heads/master@{#737932}

components/feedback/OWNERS

 afakhry@chromium.org
 jkardatzke@chromium.org
+iby@chromium.org
 zork@chromium.org
 
 per-file anonymizer_tool*=jkardatzke@chromium.org
+per-file anonymizer_tool*=iby@chromium.org
 
 # COMPONENT: Platform>Apps>Feedback