add jwata@ to recipe_modules/swarming/OWNERS
add jwata@ to recipe_modules/swarming/OWNERS

Change-Id: Ia013989fa0ce58713d5099fc62b91eea9a4ec8e3
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/recipes-py/+/2745052
Auto-Submit: Junji Watanabe <aaef61ef98ffea505db831f310be2a0eb8492537@google.com>
Commit-Queue: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>
Reviewed-by: Takuto Ikuta <71927f930fca81015e0f496c65cd126ab1a692e3@chromium.org>

luci/recipes-py,luci/recipes-py