pillow 10.3.0 prohibits daily build

[andreas-el]

webviz_subsurface/plugins/_map_viewer_fmu/_utils.py:21: error: Module "PIL.Image" is not valid as a type  [valid-type]
webviz_subsurface/plugins/_map_viewer_fmu/_utils.py:21: note: Perhaps you meant to use a protocol matching the module structure?
webviz_subsurface/plugins/_map_viewer_fmu/_utils.py:24: error: Image? has no attribute "save"  [attr-defined]
Found 2 errors in 1 file (checked 532 source files)

This seems to have been introduced around 2 April, so the project has not built for almost a month now.
https://github.com/equinor/webviz-subsurface/actions/runs/8515475794

The previous day it worked;
https://github.com/equinor/webviz-subsurface/actions/runs/8501941722/job/23285458791

https://pypi.org/project/pillow/10.3.0/#history