Indicate the need to import read_file from geopandas in the Getting started section

[NestorTejero]

I am following the Spatial Analysis with CARTOframes section in https://docs.carto.com/get-started/#carto-for-development

When in GET AREAS OF INFLUENCE there is a mention to:

aoi_gdf = read_file('http://libs.cartocdn.com/cartoframes/files/starbucks_brooklyn_isolines.geojson')
aoi_gdf.head()

While it may be obvious, there is a from geopandas import read_file missing there that may help people reading it. So this is a kind of [feature-request]