docs(middlewares): Add link to functional middlewares

... in the hint in the global middleware section.

Author: peterfication

content/middlewares.md

@@ -242,4 +242,4 @@ app.use(logger);
 await app.listen(3000);
 ```
 
-> info **Hint** Accessing the DI container in a global middleware is not possible. You need to use a functional middleware instead when using `app.use()`. Alternatively, you can use a class middleware and consume it with `.forRoutes('*')`.
+> info **Hint** Accessing the DI container in a global middleware is not possible. You can use a [functional middleware](middleware#functional-middleware) instead when using `app.use()`. Alternatively, you can use a class middleware and consume it with `.forRoutes('*')`.