Updated OWNERS of /ash/rounded_display

Change-Id: I850f72b249ec26622f8c433f2f09883038307a4e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5425764


Reviewed-by: Addison Luh <aluh@chromium.org>
Commit-Queue: Zoraiz Naeem <zoraiznaeem@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1282715}