docs(configuration): Added webpack-dev-middleware options note (#2373)

* webpack-dev-middleware options

* Update stats.md

Author: jlguenego

src/content/configuration/stats.md

@@ -18,6 +18,8 @@ The `stats` option lets you precisely control what bundle information gets displ
 
 T> For webpack-dev-server, this property needs to be in the `devServer` object.
 
+T> For webpack-dev-middleware, this property needs to be in the webpack-dev-middleware's `options` object.
+
 W> This option does not have any effect when using the Node.js API.
 
 ## `stats`