update colab notebook with README examples

Author: evelynmitchell

playground/swarms_example.ipynb

@@ -1310,7 +1310,7 @@
     "        # Customize the run method\n",
     "        response = super().run(task, *args, **kwargs)\n",
     "        # Additional custom logic\n",
-    "        return response`\n",
+    "        return response\n",
     "\n",
     "# Model\n",
     "agent = MyCustomAgent()\n",