Changes to List form blocks

the response property blocks/items/oneOf[subschema #36: ConditionalLogicBlock]/payload/conditionals/items/oneOf[#/components/schemas/SingleConditional]/payload/value became optional for the status 200

added the new rich enum value to the blocks/items/oneOf[subschema #11: EmbedAudioBlock]/payload/type response property for the response status 200