对springdoc-openapi 1.6.15版本的支持

### 环境
FASTjSON2 ：2.0.26
spring boot : 3.0.4
springdoc-openapi ： 1.6.15
JDK ：17
在使用fastJson2 作为HttpMessageConverters默认的转换以及序列化工具时。/v3/api-docs 无法正确获取数据，使用jackson一切正常。JAcKSON : https://github.com/springdoc/springdoc-openapi/issues/2143
返回的数据如下图

Reproduce the failure at the /v3/api-docs endpoint using Spring Boot 3.0.4, Fastjson2 2.0.26, springdoc-openapi 1.6.15, and JDK 17, then compare it with Jackson serialization. The issue is done when the endpoint returns correct API documentation with Fastjson2 as the default HttpMessageConverter.

Written by the indexing model from the issue text.