[Workers] Fix broken link in routing.mdx (#17234)

Author: jahands

src/content/docs/workers/static-assets/routing.mdx

@@ -25,7 +25,7 @@ In this example, request to `example.com/blog` serves the `blog.html` file.
 
 ![A request to `example.com/blog` serves the `/blog.html` file. ](~/assets/images/workers/platform/assets/workers-assets-serve-asset.png)
 
-2. If there are no assets that match the current route requested then the Worker will be invoked. If there is no Worker, [`not_found_handling`](/workers/static-assets/routing/#not_found_handling) will be evaluated. By default, a null-body 404-status response will be served.
+2. If there are no assets that match the current route requested then the Worker will be invoked. If there is no Worker, [`not_found_handling`](/workers/static-assets/routing/#2-not_found_handling) will be evaluated. By default, a null-body 404-status response will be served.
 
 In this example, request to `example.com/api` doesn't match a static asset so the Worker is invoked.