Update use-router.mdx (#57273)
Minor tweak to the wording of this section to better convey the behavior
of `scroll: false`.
"Restoration" can be interpreted as reinstating a previously saved
scroll position for that route (as it happens when using
`router.back()`), while what it actually does is preserving the current
scroll position when navigating to a new route, by means of disabling
the default "scroll to top" behavior.
Related to: https://github.com/vercel/next.js/issues/57258, and
https://github.com/vercel/next.js/discussions/47781#discussioncomment-7338499
Co-authored-by: JJ Kasper <jj@jjsweb.site>
