Example fix for #814 (#890)

Author: LadyBluenotes

src/routes/solid-start/building-your-application/api-routes.mdx

@@ -67,7 +67,7 @@ export const POST = handler;
 
 An example of an API route that returns products from a certain category and brand is shown below:
 
-```tsx title="routes/api/product/[category]/brand-[brand].ts"
+```tsx title="routes/api/product/[category]/[brand].ts"
 import type { APIEvent } from "@solidjs/start/server";
 import store from "./store";