Use more common term in recipe-api docu
Use more common term in recipe-api docu

Change-Id: I14fcb4ac713ec53eccc9f8cc2c16192f5fba013c
Reviewed-on: https://chromium-review.googlesource.com/957725
Reviewed-by: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>
Reviewed-by: Sergiy Byelozyorov <aadb4a11584aa9878242ea5d9e4b7e3429654579@chromium.org>
Commit-Queue: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>

luci/recipes-py,luci/recipes-py