Broken documentation links

[breun]

On https://spring.io/projects/spring-hateoas#learn there are some broken links:

• 2.3.1 links to https://docs.spring.io/spring-hateoas/docs/current/reference/html/, which shows the documentation for version 2.2.3.
• 2.4.0-SNAPSHOT links to https://docs.spring.io/spring-hateoas/docs/2.4.0-SNAPSHOT/reference/html/, which returns 404 Not Found.
• 2.0.7-SNAPSHOT links to https://docs.spring.io/spring-hateoas/docs/2.0.7-SNAPSHOT/reference/html/, which returns 404 Not Found.
• 1.5.5-SNAPSHOT links to https://docs.spring.io/spring-hateoas/docs/1.5.5-SNAPSHOT/reference/html/, which returns 404 Not Found.