add image to fn calling solution nb

notebooks/vertex_genai/solutions/gemini_function_calling.ipynb

@@ -17,6 +17,14 @@
     "Function calling allows developers to define custom functions and provide these functions to Gemini. While processing a query, Gemini can choose to delegate certain data processing tasks to these functions. Gemini does not call these functions, rather it provides structured data output that includes the name of a selected function and the arguments the function should be called with. You can use this output to perform tasks like invoking external APIs, performing mathematical computations, extracting structured data, and more. You can then provide the function response back to the model, allowing it to complete its answer to the query."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "3e15fc4e-2284-4c1d-bbc1-e7c855e9dd3b",
+   "metadata": {},
+   "source": [
+    "<img src=\"https://cloud.google.com/static/vertex-ai/generative-ai/docs/multimodal/images/function-calling.png\" alt=\"Function Calling\" class=\"center\">"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,