Add docs for RouteData in Integration API reference

src/content/docs/en/guides/upgrade-to/v5.mdx

@@ -1111,7 +1111,7 @@ function useRoute(route: IntegrationRouteData) {
 }
 ```
 
-<ReadMore>See the [API reference for `IntegrationRouteData`](/en/reference/integrations-reference/#integrationroutedata-type-reference).</ReadMore>
+<ReadMore>See the [API reference for `IntegrationRouteData`](/en/reference/integrations-reference/#integrationroutedata).</ReadMore>
 
 ### Changed: `distURL` is now an array (Integrations API)
 
@@ -1138,7 +1138,7 @@ if (route.distURL) {
 }
 ```
 
-<ReadMore>See the [API reference for `IntegrationRouteData`](/en/reference/integrations-reference/#integrationroutedata-type-reference).</ReadMore>
+<ReadMore>See the [API reference for `IntegrationRouteData`](/en/reference/integrations-reference/#integrationroutedata).</ReadMore>
 
 ### Changed: Arguments passed to `app.render()` (Adapter API)
 

src/content/docs/en/reference/adapter-reference.mdx

@@ -476,11 +476,11 @@ If not provided, Astro will fallback to its default behavior for fetching error
 
 <p>
 
-**Type:** `RouteData`<br />
+**Type:** [`RouteData`](/en/reference/integrations-reference/#routedata)<br />
 **Default:** `app.match(request)`
 </p>
 
-Provides a value for [`integrationRouteData`](/en/reference/integrations-reference/#integrationroutedata-type-reference) if you already know the route to render. Doing so will bypass the internal call to [`app.match()`](#appmatch) to determine the route to render.
+Defines the information about a route. This is useful when you already know the route to render. Doing so will bypass the internal call to [`app.match()`](#appmatch) to determine the route to render.
 
 ```js "routeData"
 const routeData = app.match(request);