Invalid bucket name used in hpo_image_classification_early_stopping.ipyng notebook

In the Data preparation section.

Error message
ParamValidationError: Parameter validation failed:
Invalid bucket name "<>": Bucket name must match the regex "^[a-zA-Z0-9.\-_]{1,255}$" or be an ARN matching the regex "^arn:(aws).*:s3:[a-z\-0-9]+:[0-9]{12}:accesspoint[/:][a-zA-Z0-9\-]{1,63}$"

Open hpo_image_classification_early_stopping.ipyng and inspect the Data preparation section where the bucket name is used. Reproduce the ParamValidationError and determine what change is needed so the notebook accepts a valid bucket name without that error.

Written by the indexing model from the issue text.