Ruff and clean notebook update

[hoxbro]

Add a reference to the asyncio task because of this.

[codecov-commenter]

Codecov Report

Merging #5627 (261b67b) into main (3b47846) will decrease coverage by 0.02%.
The diff coverage is 71.55%.

@@            Coverage Diff             @@
##             main    #5627      +/-   ##
==========================================
- Coverage   88.27%   88.26%   -0.02%     
==========================================
  Files         302      302              
  Lines       62496    62505       +9     
==========================================
  Hits        55171    55171              
- Misses       7325     7334       +9     

Impacted Files	Coverage Δ
holoviews/core/data/multipath.py	86.55% <0.00%> (ø)
holoviews/core/data/xarray.py	88.86% <ø> (ø)
holoviews/core/dimension.py	86.77% <0.00%> (ø)
holoviews/core/io.py	80.34% <0.00%> (ø)
holoviews/core/ndmapping.py	79.27% <0.00%> (ø)
holoviews/core/sheetcoords.py	66.88% <0.00%> (ø)
holoviews/operation/datashader.py	83.90% <0.00%> (ø)
holoviews/plotting/bokeh/element.py	88.20% <ø> (ø)
holoviews/plotting/mpl/chart.py	64.07% <ø> (ø)
holoviews/plotting/mpl/element.py	90.12% <0.00%> (ø)
... and 28 more

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