Update Images in Slide Deck - Data Cubes, Cubes + Columns for Parquet

[wildintellect]

Looking over the Slide Deck (also applies to the website content - which should share assets):

1. https://developmentseed.org/cloud-optimized-geospatial-formats-guide/overview.html#/what-makes-cloud-optimized-challenging-1 we should add Data Cube 3d, and Data Cubes 4d+ (aka N-dimensional) to the graphic.
2. on the Geoparquet page to show the difference with Flatgeobuf the image should highlight columns for subselection.
   something like
   
   https://pandas.pydata.org/docs/getting_started/intro_tutorials/03_subset_data.html
   then we can do similar for row based:
   
   This is separate from a graphic explaining how the metadata is stored.

[kylebarron]

Sadly those images have lost their hyperlinks 😢 . In a revision we could also note that it's possible to store an array of data cubes inside of Parquet

[wildintellect]

@kylebarron just go to the pandas doc page https://pandas.pydata.org/docs/getting_started/intro_tutorials/03_subset_data.html
https://pandas.pydata.org/docs/_images/03_subset_columns.svg
https://pandas.pydata.org/docs/_images/03_subset_rows.svg