Polish "Update docs to use @SpringBootConfiguration not @configuration"

See gh-26937

Author: wilkinsona

spring-boot-project/spring-boot-docs/src/docs/asciidoc/using-spring-boot.adoc

@@ -364,7 +364,8 @@ A single `@SpringBootApplication` annotation can be used to enable those three f
 
 * `@EnableAutoConfiguration`: enable <<using-boot-auto-configuration,Spring Boot's auto-configuration mechanism>>
 * `@ComponentScan`: enable `@Component` scan on the package where the application is located (see <<using-boot-structuring-your-code,the best practices>>)
-* `@SpringBootConfiguration`: an alternative to Spring's standard `@Configuration`, allow to register extra beans in the context or import additional configuration classes
+* `@SpringBootConfiguration`: enable registration of extra beans in the context or the import of additional configuration classes.
+An alternative to Spring's standard `@Configuration` that aids <<spring-boot-features#boot-features-testing-spring-boot-applications-detecting-config,configuration detection>> in your integration tests.
 
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