PUT /api/pipelines/:pipeline_uuid/backfills/:backfill_id
All default attributes for a backfill may be updated in addittion to the following:
"2023-09-05 23:56:05"
."2023-09-05 23:56:05"
.minute
, hour
, day
, week
, month
, or year
.initial
, running
, completed
, failed
, cancelled
.