Update widget notebook to use essreduce (24.12) or later

[jokasimr]

Tried to update the dependencies in esssans. Doing that the docs build started failing with this error: https://github.com/scipp/esssans/actions/runs/12865207885/job/35868437664?pr=193.

# In user-guide/loki/workflow-widget-loki.ipynb
AttributeError                            Traceback (most recent call last)
Cell In[2], line 18
     16 # Enable DirectBeam input
     17 pbox._input_widgets[DirectBeam].children[0].enabled = True
---> 18 pbox._input_widgets[DirectBeam].children[0].wrapped._option_box.value = None
     19 # Adjust Q range
     20 pbox._input_widgets[QBins].children[0].fields["start"].value = 0.01

AttributeError: 'Checkbox' object has no attribute 'wrapped'

The error seems so be caused by breaking changes in essreduce somewhere between v24.10.3 and v24.12.0.