Update the name of the S3 folder to write dumps to: /wikibase-dumps -> /wikidata-rdf-export
A more dignified name is in order. This follows the plan the eng team settled on together in our collab session on June 30.
Setting the YYYYMMDD-HHMMSS subdir (vs the current setup of in being the YYYYMMDD of the DAG's data interval) will happen in !2319 (merged); this change just cleans up the top-level directory so we have a neater structure when we do s3cmd ls .
Bug: T432134