fix(docs): missing period (#726)

Author: simovicaleksa

src/routes/solid-router/migration.mdx

@@ -15,7 +15,7 @@ Similarly, nested `<Routes>` components cause waterfalls and are `<Outlets>` the
 
 With no `<Routes>` means the `<Router>` API has changed.
 The `<Router>` component acts as the `<Routes>` component now and its children must now be `<Route>` components.
-The top-level layout should go in the root prop of the router [as shown above](#configure-your-routes)
+The top-level layout should go in the root prop of the router [as shown above](#configure-your-routes).
 
 ## `element` prop removed from `Route`