修改“相关实例”标题

Signed-off-by: NLing <lingming@huawei.com>

zh-cn/application-dev/application-models/serviceextensionability.md

@@ -449,9 +449,9 @@ ServiceExtensionAbility服务组件在[onConnect()](../reference/apis/js-apis-ap
   }
   ```
 
-## 相关示例
+## 相关实例
 
-针对ServiceExtensionAbility开发，有以下相关示例可供参考：
+针对ServiceExtensionAbility开发，有以下相关实例可供参考：
 
 - [`AbilityConnectServiceExtension`：Ability与ServiceExtensionAbility通信（ArkTS）（API9）（Full SDK）](https://gitee.com/openharmony/applications_app_samples/tree/master/code/BasicFeature/IDL/AbilityConnectServiceExtension)
 - [`StageModel`：Stage模型（ArkTS）（API9）（Full SDK）](https://gitee.com/openharmony/applications_app_samples/tree/master/code/BasicFeature/ApplicationModels/StageModel)