04a_builtin_training.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/prep_data/image_data_guide/04a_builtin_training.ipynb

Error:

---------------------------------------------------------------------------
Exception encountered at "In [2]":
---------------------------------------------------------------------------
FileNotFoundError Traceback (most recent call last)
in
----> 1 with open('pickled_data/builtin_bucket_name.pickle', 'rb') as f:
2 bucket_name = pickle.load(f)
3 print('Bucket Name: ', bucket_name)
4
5 with open('pickled_data/category_labels.pickle', 'rb') as f:

FileNotFoundError: [Errno 2] No such file or directory: 'pickled_data/builtin_bucket_name.pickle'

Open prep_data/image_data_guide/04a_builtin_training.ipynb and inspect the setup before In [2], where the missing pickled_data files are first used. Reproduce the notebook's CI failure and trace how those files are expected to become available. Done means the notebook completes CI without the FileNotFoundError.

Written by the indexing model from the issue text.