Documentation Link on spring.io for 4.1.3 does not work.

[madorb]

Describe the bug
Go to Spring Cloud Gateway project learn tab on spring.io https://spring.io/projects/spring-cloud-gateway#learn

Click Reference Doc next to 4.1.3 current and it takes you to a 404 page (https://docs.spring.io/spring-cloud-gateway/reference/current/index.html) when i believe the working page is actually https://docs.spring.io/spring-cloud-gateway/reference/index.html

Clicking Reference Doc next to 4.0.9 brings you to a slightly different route and works (https://docs.spring.io/spring-cloud-gateway/docs/4.0.9/reference/html/)

Note that the working "current" url https://docs.spring.io/spring-cloud-gateway/docs/current/reference/html/ actually points to version 4.0.9 which is could certainly be a bit confusing.