object_detection_birds.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/introduction_to_amazon_algorithms/object_detection_birds/object_detection_birds.ipynb

Error:

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Exception encountered at "In [16]":
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ParamValidationError Traceback (most recent call last)
in
3 validation_channel = prefix + '/validation'
4
----> 5 sess.upload_data(path='birds_ssd_sample_train.rec', bucket=bucket, key_prefix=train_channel)
6 sess.upload_data(path='birds_ssd_sample_val.rec', bucket=bucket, key_prefix=validation_channel)
7

/usr/local/lib/python3.7/site-packages/sagemaker/session.py in upload_data(self, path, bucket,

[...]

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

Open introduction_to_amazon_algorithms/object_detection_birds/object_detection_birds.ipynb and inspect cell In [16], especially the sess.upload_data calls and bucket value. Run the notebook or its CI validation to confirm how the placeholder bucket is handled. Done means the notebook no longer fails with the invalid bucket-name error.

Written by the indexing model from the issue text.