Fix a typo in the Download File Summary section on My Dataset page

[nozomione]

Issue Number

Closes #1595

Purpose/Implementation Notes

I've fixed a typo in dataset.get_files_summary and adjusted the corresponding test.

Types of changes

• Bugfix (non-breaking change which fixes an issue)

Functional tests

N/A

Checklist

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Screenshots

N/A

[davidsmejia]

🦅

[avrohomgottlieb]

👍