chore: update openapi

docs/openapi.yaml

@@ -1,7 +1,7 @@
 openapi: 3.0.0
 info:
   title: WhatsApp API MultiDevice
-  version: 3.2.0
+  version: 3.2.1
   description: This API is used for sending whatsapp via API
 servers:
   - url: http://localhost:3000
@@ -199,11 +199,6 @@ paths:
           schema:
             type: boolean
           example: true
-        - name: is_preview
-          in: query
-          schema:
-            type: integer
-          example: true
       responses:
         '200':
           description: OK