`download_demo` may fail for some `data.zip` files

[fealho]

This issue pertains to the changes in a future SDV release (currently in the branch feature-branch-download-demo).

Problem Description

The download demo method fails for datasets uploaded to the S3 bucket where the data.zip file (consisting of one or more compressed csv files) was created locally:

download_demo('single_table', 'dataset_with_locally_generated_data')

'utf-8' codec can't decode byte 0xb4 in position 99: invalid start byte

Expected behavior

The download_demo method should be able to download, extract and load the data.