SageNet tutorial notebook missing one cell for model training

[sebastianbirk]

In the part where multiple spatial references are used, the model seems to not be trained on them before being saved (likely one notebook cell got accidentally deleted) -> https://scarches.readthedocs.io/en/latest/SageNet_mouse_embryo.html#Training-with-multiple-spatial-references.

[bitcometz]

you are right !