fix(pagination-nav): set `button type="button"` to prevent form submission

[metonym]

When PaginationNav is used inside a form, the form will be submitted when clicking a page button.

This is because the button lacks an explicit type attribute. If contained within a form, the default type is "submit."

<form>
  <PaginationNav />
</form>

[metonym]

Fixed in v0.82.1