Add /mediawiki/wikibase/entity/rdf_change/2.0.0
requested to merge dcausse/schemas-event-primary:T374918-mediawiki_wikibase_entity_rdf_change into master
- Start from V2.0.0 to denote the fact that we already had a non-official schema
- Originally uploaded at https://gerrit.wikimedia.org/r/c/schemas/event/primary/+/594098
Bug: T374918