docs[patch]: Add note about openai formatted tools (#5870)

docs/core_docs/docs/how_to/tool_calling.ipynb

@@ -65,10 +65,16 @@
         "## Passing tools to LLMs\n",
         "\n",
         "Chat models that support tool calling features implement a [`.bindTools()`](https://v02.api.js.langchain.com/classes/langchain_core_language_models_chat_models.BaseChatModel.html#bindTools) method, which \n",
-        "receives a list of LangChain [tool objects](https://v02.api.js.langchain.com/classes/langchain_core_tools.StructuredTool.html) \n",
+        "receives a list of LangChain [tool objects](https://v02.api.js.langchain.com/classes/langchain_core_tools.StructuredTool.html)\n",
         "and binds them to the chat model in its expected format. Subsequent invocations of the \n",
         "chat model will include tool schemas in its calls to the LLM.\n",
         "\n",
+        "```{=mdx}\n",
+        ":::note\n",
+        "As of `@langchain/core` version `0.2.9`, all chat models with tool calling capabilities now support [OpenAI-formatted tools](https://api.js.langchain.com/interfaces/langchain_core_language_models_base.ToolDefinition.html).\n",
+        ":::\n",
+        "```\n",
+        "\n",
         "Let's walk through a few examples:"
       ]
     },