Changes to Construct message

added highlighted discriminator mapping keys to the messages/items/markup/items request property

removed code discriminator mapping keys from the messages/items/markup/items request property

the keyboard/allOf[#/components/schemas/Keyboard]/buttons/items/items/text request property's minLength was increased from 0 to 1

removed the request property messages/items/link

removed the request property messages/items/notify

added the new optional request property messages/items/format

added the new optional request property messages/items/markup

the request property messages/items/attachments became optional

the request property messages/items/text became optional

the data request property type changed from string, to string

added share discriminator mapping keys to the messages/items/attachments/items request property

the data request property's maxLength was increased from 4096 to 8192

endpoint added