(AzureCXP) fixes MicrosoftDocs/azure-docs#122864

Updated line no:39 from "assistant" to "user"

Author: PesalaPavan

articles/ai-services/openai/assistants-reference-messages.md

@@ -36,7 +36,7 @@ Create a message.
 
 |Name | Type | Required | Description |
 |---  |---   |---       |---          |
-| `role` | string | Required | The role of the entity that is creating the message. Can be `user` or `assistant`. `assistant` indicates the message is sent by an actual user and should be used in most cases to represent user-generated messages. `assistant` indicates the message is generated by the assistant. Use this value to insert messages from the assistant into the conversation. |
+| `role` | string | Required | The role of the entity that is creating the message. Can be `user` or `assistant`. `user` indicates the message is sent by an actual user and should be used in most cases to represent user-generated messages. `assistant` indicates the message is generated by the assistant. Use this value to insert messages from the assistant into the conversation. |
 | `content` | string | Required | The content of the message. |
 | `file_ids` | array | Optional | A list of File IDs that the message should use. There can be a maximum of 10 files attached to a message. Useful for tools like retrieval and code_interpreter that can access and use files. |
 | `metadata` | map | Optional | Set of 16 key-value pairs that can be attached to an object. This can be useful for storing additional information about the object in a structured format. Keys can be a maximum of 64 characters long and values can be a maximum of 512 characters long. |