swarming: use chromium.org in owners
swarming: use chromium.org in owners

Change-Id: I03b90e8461723c2b2d338a5a49804c9a9d6d9eff
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/3145037
Commit-Queue: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Commit-Queue: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>
Auto-Submit: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Reviewed-by: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>

luci/recipes-py,luci/recipes-py