Update 28.3.1. Entity Classes.md

IV. Spring Boot features/28.3.1. Entity Classes.md

@@ -44,4 +44,4 @@ public class City implements Serializable {
     // ... etc
 }
 ```
-**注**：你可以使用@EntityScan注解自定义实体扫描路径。具体参考[Section 67.4, “Separate @Entity definitions from Spring configuration”](http://docs.spring.io/spring-boot/docs/current-SNAPSHOT/reference/htmlsingle/#howto-separate-entity-definitions-from-spring-configuration)。
+**注**：你可以使用@EntityScan注解自定义实体扫描路径。具体参考[Section 67.4, “Separate @Entity definitions from Spring configuration”](../IX. ‘How-to’ guides/67.4. Separate @Entity definitions from Spring configuration.md)。