[ENH] Update How to use EDS book notebooks

[acocac]

Are the notebook repository urls still up-to-date? For instance, the raw files for the DeepForest notebook returns a 400 error. Likewise, the EDS gallery only contains the .ipynb, not the lock files (as stated here).

I set up the environment manually, but I believe this is resulting in the xarray package not loading correctly.

Originally posted by @camappel in #122 (comment)