Fix minor documentation error for rsbuild consumer example (#4075)

Author: mcalthrop

apps/website-new/docs/en/guide/start/quick-start.mdx

@@ -132,7 +132,7 @@ Here is an example of creating an rsbuild consumer project:
 │
 ◇  Next steps ─────╮
 │                  │
-│  cd mf_provider  │
+│  cd mf_consumer  │
 │  npm install     │
 │  npm run dev     │
 │                  │