Add --recursive to the S3 receipts check in module 01

[kakakakakku]

Thank you for this great workshop!
I noticed a small improvement while working through it (it might be a tiny one 😀), so I'm sending it your way.

Changes

In module 01, running the awslocal s3 ls command only shows the folder.

$ awslocal s3 ls s3://order-receipts/
                           PRE receipts/

Since we want to check the actual S3 objects here, I believe --recursive is needed.

$ awslocal s3 ls --recursive s3://order-receipts/
2026-08-22 08:55:37        136 receipts/6a9fb79d1845.json

Thank you 🙌