Changes to 获取公众号文章列表/Get WeChat MP Account Articles

added the optional property detail/items/ctx to the response with the 422 status

added the optional property detail/items/input to the response with the 422 status

changed the pattern of the request property username from ^gh_[A-Za-z0-9_]+$ to ^[0-9A-Za-z][-_0-9A-Za-z]{1,63}(@[0-9A-Za-z]{1,16})?$

the page_size request property's max was increased from 20.00 to 100.00

the username request property's maxLength was increased from 64 to 80

the page_size request property's min was decreased from 10.00 to 1.00

endpoint added