Update fine-tuned-openai-models.mdx (#91)

Author: sahilsuman933

customization/custom-llm/fine-tuned-openai-models.mdx

@@ -48,7 +48,7 @@ To set up your OpenAI Fine-Tuned model, you need to follow these steps:
 1. Set the custom llm URL to `https://api.openai.com/v1`.
 2. Assign the custom llm key to the OpenAI key.
 3. Update the model to their model.
-4. Execute a PATCH request to the `/assistant` endpoint and ensure that `model.urlRequestMetadataEnabled` is set to false.
+4. Execute a PATCH request to the `/assistant` endpoint and ensure that `model.metadataSendMode` is set to off.
 
 ## Using your server