Update the documentation description for "config-service.cache.enabled"

docs/en/deployment/distributed-deployment-guide.md

@@ -1494,6 +1494,8 @@ The default is false. Please evaluate the total configuration size and adjust th
 
 > Ensure that the app.id of the configuration in the application is in the correct case when caching is enabled, otherwise it will not fetch the correct configuration
 
+> `config-service.cache.enabled` configuration adjustment requires a restart of the config service to take effect
+
 ### 3.2.4 `item.key.length.limit`- Maximum length limit for configuration item key
 
 The default configuration is 128.

docs/zh/deployment/distributed-deployment-guide.md

@@ -1438,6 +1438,8 @@ http://5.5.5.5:8080/eureka/,http://6.6.6.6:8080/eureka/
 
 > 开启缓存后必须确保应用中配置的app.id大小写正确，否则将获取不到正确的配置
 
+> `config-service.cache.enabled` 配置调整必须重启 config service 才能生效
+
 ### 3.2.4 item.key.length.limit - 配置项 key 最大长度限制
 
 默认配置是128。