Docs: Modify examples using specific directory path

[41ow1ives]

• ETL_01_how_to_run.ipynb
• ETL_02_one_cycle.ipynb

Above examples are loading ETL config via directory path since this example was for users who cloned Dataverse repository.
However, it would be better to add defining configuration steps for users who didn't clone.

Thanks for letting us know, @gmlwo085