Update note about the availability of the o3-deep-research model...

...for use only with the Deep Research tool in the documentation.

Author: sanjeev3

articles/ai-foundry/agents/how-to/tools/deep-research-samples.md

@@ -14,7 +14,7 @@ ms.author: aahi
 # How to use the Deep Research tool
 
 > [!NOTE]
-> * The Agents service and SDK use the Azure OpenAI `o3-deep-research` model. This model is **not** available for use in Azure OpenAI Chat Completions and Responses APIs.
+> * The `o3-deep-research` model is available for use **only with the Deep Research tool**. It is **not** available in the Azure OpenAI Chat Completions and Responses APIs.
 > * The **parent** AI Foundry project resource and the contained  `o3-deep-research` and GPT models **children** resources **must exist** in the same Azure subscription and region. Supported regions are **West US** and **Norway East**.
 
 Use this article to learn how to use the Deep Research tool with the Azure AI Projects SDK, including code examples and setup instructions.