source.type can be "rdsIam", not "rds"
Small fix of logical config example: rds->rdsIam
Source of truth: https://gitlab.com/postgres-ai/database-lab/-/blob/d2c53482a72b06ff839fe66eb7ee8a52d35ae319/engine/internal/retrieval/engine/postgres/logical/dump.go#L49
Edited by Nikolay Samokhvalov