update model id in llm readme

Author: commit111

samples/managed-llm-provider/README.md

@@ -43,10 +43,11 @@ For this sample, you will need to provide the following [configuration](https://
 > Note that if you are using the 1-click deploy option, you can set these values as secrets in your GitHub repository and the action will automatically deploy them for you.
 
 ### `MODEL`
-The Model ID of the LLM you are using for your application. For example, `anthropic.claude-3-haiku-20240307-v1:0`.
+The Model ID of the LLM you are using for your application. For example, `ai/claude3-haiku`. 
 ```bash
 defang config set MODEL
 ```
+For more about model mapping, please see our [Model Mapping documentation](https://docs.defang.io/docs/concepts/managed-llms/openai-access-gateway#model-mapping). 
 
 ## Deployment
 

samples/managed-llm/README.md

@@ -46,10 +46,11 @@ For this sample, you will need to provide the following [configuration](https://
 > Note that if you are using the 1-click deploy option, you can set these values as secrets in your GitHub repository and the action will automatically deploy them for you.
 
 ### `MODEL`
-The Model ID of the LLM you are using for your application. For example, `anthropic.claude-3-haiku-20240307-v1:0`.
+The Model ID of the LLM you are using for your application. For example, `ai/claude3-haiku`. 
 ```bash
 defang config set MODEL
 ```
+For more about model mapping, please see our [Model Mapping documentation](https://docs.defang.io/docs/concepts/managed-llms/openai-access-gateway#model-mapping). 
 
 ## Deployment