fix: remove beta status from modelOutputInMessagesEnabled feature

Remove the beta status text from the modelOutputInMessagesEnabled property
description in the OpenAPI specification. The feature is now GA.

This affects the description in 4 locations where the property appears
in different assistant/workflow configuration schemas.

Refs: PRO-627

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Vapi Tasker

fern/apis/api/openapi.json

@@ -26567,7 +26567,7 @@
           },
           "modelOutputInMessagesEnabled": {
             "type": "boolean",
-            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\nDefault `false` while in beta.\n\n@default false",
+            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\n@default false",
             "example": false
           },
           "transportConfigurations": {
@@ -27505,7 +27505,7 @@
           },
           "modelOutputInMessagesEnabled": {
             "type": "boolean",
-            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\nDefault `false` while in beta.\n\n@default false",
+            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\n@default false",
             "example": false
           },
           "transportConfigurations": {
@@ -28340,7 +28340,7 @@
           },
           "modelOutputInMessagesEnabled": {
             "type": "boolean",
-            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\nDefault `false` while in beta.\n\n@default false",
+            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\n@default false",
             "example": false
           },
           "transportConfigurations": {
@@ -29265,7 +29265,7 @@
           },
           "modelOutputInMessagesEnabled": {
             "type": "boolean",
-            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\nDefault `false` while in beta.\n\n@default false",
+            "description": "This determines whether the model's output is used in conversation history rather than the transcription of assistant's speech.\n\n@default false",
             "example": false
           },
           "transportConfigurations": {