[fix] smooth scrolling css leaks from component to whole package

[werdnanoslen]

ReactUSWDS Version & USWDS Version:

At least react-uswds v9.0.0

Describe the bug

This smooth scrolling leaks to any page where this package is used

react-uswds/src/components/InPageNavigation/InPageNavigation.module.scss

Lines 1 to 5 in db2e4f6

	@media not (prefers-reduced-motion) {
	html {
	scroll-behavior: smooth;
	}
	}

To Reproduce
Steps to reproduce the behavior:

1. Use react-uswds on a page, use any component but InPageNavigation
2. See that the smooth scrolling is applied to the html root

Expected behavior

It should only be applied where the InPageNavigation component is used.

Additional context

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

All browsers