[fix]: Pagination a11y issue on role attribute

[rylew1]

ReactUSWDS Version & USWDS Version:

Describe the bug

To Reproduce
Steps to reproduce the behavior:

1. Add a Pagination component

2. Run LIghthouse with a11y checked:
   

3. Observe a11y issue flagged by Lighthouse:
   

Expected behavior

No a11y issues reported

Additional context

It looks like dependabot updated things from uswds here: #2556
If you look at the release notes you'll see the Pagination issue looks like it was fixed:

But the dependabot update didn't replace the role attribute in the Pagination component.

We need to replace the role attribute with this: aria-label="ellipsis indicating non-visible pages"

Device and Browser Information (please complete the following information if describing a UI bug):

• OS: Mac
• Browser: chrome
• Version @trussworks/react-uswds: 7.0.0
• Version @uswds/uswds: ^3.6.0