docs: Fixing reference to config.devMiddleware (#104)

Ian Walter · shellscape · commit 316e8f88377c · 2018-10-02T14:24:10.000-04:00
diff --git a/README.md b/README.md
@@ -151,7 +151,7 @@ for more information and a workaround.
 
 ## Server-Side-Rendering
 
-When `serverSideRender` is set to true in `config.dev`, `webpackStats` is
+When `serverSideRender` is set to true in `config.devMiddleware`, `webpackStats` is
 accessible from `ctx.state.webpackStats`.
 
 ```js
