[Feedback] Textract/Comprehend notebook example needs updates

[Laren-AWS]

This example has a few issues that must be addressed: https://github.com/awsdocs/aws-doc-sdk-examples/blob/main/python/cross_service/textract_comprehend_notebook/

Reported issues:

• Old Python version (3.5).
• Security/password handling is non-standard.
• Sagemaker provides a default bucket that should be used.
• Don't pass auth info on every boto3 call.

[github-actions[bot]]

Marked stale by the Shirriff. Notifying @awsdocs/aws-sdk-docs-code-maintainers