Updated info on resnet backbones
"```\n",
"\n",
"where `data` is the databunch created in earlier steps using `prepare_data` method.\n",
+ "You can optionally provide a `backbone` parameter, the default value for which is `vgg19`. In our implementation of Edge Detection models ResNets can also be used apart from VGGNets as the backbones.\n",
"\n",
"For more information about the API, please go to the [API reference](https://esri.github.io/arcgis-python-api/apidoc/html/arcgis.learn.html)."
]
