Describe the bug 当我使用AbstractConfigChangeListener进行配置监听时，有配置变更了，将会调用YmlChangeParser中的doParse方法来将新旧配置转换为map并筛选出被修改的配置返回以修改的配置，在进行getFlattenedMap方法时，抛出了ClassCastException（java.lang.Integer cannot be cast to java.lang.String）异常，造成这个的原因是因为我的yml配置中，有一个int类型，比如 When I use AbstractConfigChangeListener for configuration listening, there is a configuration change, and the doParse method in YmlChangeParser will be called to convert the old and new configurations to map and filter out the modified configurations back to the modified configurations, when the getFlattenedMap method is performed. I threw the ClassCastException (java.lang.Integer cannot be cast to java.lang.String) exception, and the reason for this is because my yml configuration has an int type, such as
nacos中的配置： Configuration in nacos: kd： 100：FFLANCNALSD