Spring Cloud Openfeign Fix possible outdated docs

Describe the bug https://cloud.spring.io/spring-cloud-openfeign/reference/html/#spring-cloud-feign-inheritance

It is generally not advisable to share an interface between a server and a client. It introduces tight coupling, and also actually doesn’t work with Spring MVC in its current form (method parameter mapping is not inherited).

I'm sharing interface between @RestController and @FeignClient, It's works fine with latest Spring MVC.

Comment From: OlgaMaciaszek

Ok, thanks @quaff, I will update the doc, however, I still would say it's not advisable to do it.