Added figure to notebook (#246)

Co-authored-by: Li Jiang <[email protected]>

Author: smty2018

notebook/agentchat_groupchat_vis.ipynb

@@ -118,6 +118,15 @@
     "## Construct Agents"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<div style=\"margin: 0 auto; width: 500px\">\n",
+    "    <img src=\"viz_gc.png\" alt=\"Drawing\"/>\n",
+    "  </div>"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 3,