Document Settings as jooq supported auto-configuration type

See gh-18870

Author: djarnis73

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -3489,6 +3489,7 @@ You can define beans for the following jOOQ Types:
 * `ExecuteListenerProvider`
 * `VisitListenerProvider`
 * `TransactionListenerProvider`
+* `Settings`
 
 You can also create your own `org.jooq.Configuration` `@Bean` if you want to take complete control of the jOOQ configuration.