Update javascript.express__v7.x.mdx

Author: chargome

platform-includes/getting-started-node/javascript.express__v7.x.mdx

@@ -114,6 +114,8 @@ app.use(function onError(err, req, res, next) {
 app.listen(3000);
 ```
 
+## Verify
+
 You can verify the Sentry integration by creating a route that will throw an error:
 
 ```javascript
@@ -196,4 +198,4 @@ When capturing errors locally, ensure that your project's data filter for filter
 
 ![Issue alert](./img/express-data-filters.png)
 
-This ensures that errors produced by your browser (such as HTTP-method errors) are properly captured.
+This ensures that errors produced by your browser (such as HTTP-method errors) are properly captured.