SpringBoot Add link to appendix from error handling documentation

Please add documentation for server.error properties. There is no mention in Error Handling docs

Comment From: scottfrederick

The server.error properties are documented in the Common Application Properties appendix: https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#server-properties. It would be useful to link to these properties from the Error Handling section.

Comment From: mbhave

Closing in favor of #24314.