feedback: Add iby to api OWNERS file.

BUG=None
TEST=None

Change-Id: If4f2c9c319807cf94c212c006171d4fe7bda7da9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2250357
Commit-Queue: Miriam Zimmerman <mutexlox@chromium.org>
Commit-Queue: J Kardatzke <jkardatzke@chromium.org>
Auto-Submit: Miriam Zimmerman <mutexlox@chromium.org>
Reviewed-by: J Kardatzke <jkardatzke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#779489}

chrome/browser/extensions/api/feedback_private/OWNERS

 afakhry@chromium.org
 jkardatzke@chromium.org
+iby@chromium.org
 
 # COMPONENT: Platform>Apps>Feedback