update CUSTOM_MODELS config for Azure mode.

README.md

@@ -181,6 +181,7 @@ Specify OpenAI organization ID.
 ### `AZURE_URL` (optional)
 
 > Example: https://{azure-resource-url}/openai/deployments/{deploy-name}
+> if you config deployment name in `CUSTOM_MODELS`, you can remove `{deploy-name}` in `AZURE_URL`
 
 Azure deploy url.
 
@@ -245,6 +246,9 @@ To control custom models, use `+` to add a custom model, use `-` to hide a model
 
 User `-all` to disable all default models, `+all` to enable all default models.
 
+For Azure: use `modelName@azure=deploymentName` to customize model name and deployment name.
+> Example: `+gpt-3.5-turbo@azure=gpt35` will show option `gpt35(Azure)` in model list.
+
 ### `DEFAULT_MODEL` （optional）
 
 Change default model