Fix and improve Javadoc in spring-aop

Closes gh-28803

spring-aspects/src/main/java/org/springframework/context/annotation/aspectj/EnableSpringConfigured.java

@@ -26,7 +26,7 @@ import org.springframework.context.annotation.Import;
 
 /**
  * Signals the current application context to apply dependency injection to
- * non-managed classes that are instantiated outside of the Spring bean factory
+ * non-managed classes that are instantiated outside the Spring bean factory
  * (typically classes annotated with the
  * {@link org.springframework.beans.factory.annotation.Configurable @Configurable}
  * annotation).