Fix "xarray has no attribute reshape"

[aeisenbarth]

A .values attribute has been forgotten.

label is a SpatialImage and DataArray. Scikit-image expects a true array with a reshape method. All other uses of _map_color_seg pass the correct value, e.g.:

spatialdata-plot/src/spatialdata_plot/pl/render.py

Lines 618 to 620 in 09a31ad

	labels_infill = _map_color_seg(
	seg=label.values,
	cell_id=instance_id,

[aeisenbarth]

(I thought I had seen this already fixed by another contributor, but couldn't find it merged or in a PR.)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (09a31ad) 78.99% compared to head (2fdb783) 78.99%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #208   +/-   ##
=======================================
  Coverage   78.99%   78.99%           
=======================================
  Files          11       11           
  Lines        1314     1314           
=======================================
  Hits         1038     1038           
  Misses        276      276           

Files	Coverage Δ
src/spatialdata_plot/pl/render.py	89.68% <ø> (ø)

[timtreis]

True, thank you!