Update API specifications with fern api update (#810)

Co-authored-by: github-actions <github-actions@github.com>

Author: github-actions[bot]

fern/apis/api/openapi.json

@@ -33290,6 +33290,14 @@
       "TwilioSMSChatTransport": {
         "type": "object",
         "properties": {
+          "conversationType": {
+            "type": "string",
+            "description": "This is the conversation type of the call (ie, voice or chat).",
+            "default": "chat",
+            "enum": [
+              "chat"
+            ]
+          },
           "phoneNumberId": {
             "type": "string",
             "description": "This is the phone number that will be used to send the SMS.\nIf provided, will create a new session. If not provided, uses existing session's phoneNumberId.\nThe phone number must have SMS enabled and belong to your organization."