next.js

904908cf - docs(pages): update slug value for optional catch all routes (#64381)

docs(pages): update slug value for optional catch all routes (#64381) ## Why? When you do, → ``` const router = useRouter() console.log('[test] router =', router.query.slug) ``` the value of `router.query.slug` should be undefined in this instance. (screenshot from current docs)  it should be `slug: undefined`.