fix datasetPageHeader download button

[davidsmejia]

Issue Number

n/a

Purpose/Implementation Notes

This prevents redefining dataSet in the handler for the download button. The linter should have caught this.

Types of changes

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

Functional tests

n/a downloaded a dataset locally

Checklist

• [x] Lint and unit tests pass locally with my changes

Screenshots

n/a