update vignette, using new spatialdata.data methods

[Artur-man]

@vjcitn currently x <- MulticancerSteinbock(td) does not work, here is the error below. Perhaps the object is outdated given new validations in anndata object ?

Error in py_call_impl(callable, call_args$unnamed, call_args$named) : 
  spatialdata._core.validation.ValidationError: Cannot construct SpatialData object, input contains invalid elements.
For renaming, please see the discussion here https://github.com/scverse/spatialdata/discussions/707 .
  obs/image: Key `image` is not unique, or another case-variant of it exists.
  var/Tube Number: Name must contain only alphanumeric characters, underscores, dots and hyphens.
  var/Antibody Clone: Name must contain only alphanumeric characters, underscores, dots and hyphens.
  var/Stock Concentration: Name must contain only alphanumeric characters, underscores, dots and hyphens.
  var/Final Concentration / Dilution: Name must contain only alphanumeric characters, underscores, dots and hyphens.
  var/uL to add: Name must contain only alphanumeric characters, underscores, dots and hyphens.
Run `reticulate::py_last_error()` for details.

[vjcitn]

@Artur-man I am not sure I understand the situation. Are you saying that MulticancerSteinbock fails in the context of this pull request? With Bioc 3.22 and BiocManager valid, I have been unable to trigger that error. Can you run session_info within python when the error is triggered?

[Artur-man]

ah sorry man, had to (re)install a bunch of stuff to get this to work again. Works as expected!