Reinstate Spring for GraphQL auto-configuration

This commit adds the Spring for GraphQL auto-configuration back
into Spring Boot 3.0, now that a 1.1.0 release is scheduled with the
required baseline. This release also needs GraphQL Java 19.0 as a
baseline.

Closes gh-31809

buildSrc/src/main/java/org/springframework/boot/build/context/properties/DocumentConfigurationProperties.java

@@ -174,6 +174,7 @@ public class DocumentConfigurationProperties extends DefaultTask {
 	}
 
 	private void webPrefixes(Config prefix) {
+		prefix.accept("spring.graphql");
 		prefix.accept("spring.hateoas");
 		prefix.accept("spring.http");
 		prefix.accept("spring.servlet");