Update cut plane notebook documentation

[zoccoler]

This PR updates documentation regarding the 'crop' option of the cut_with_plane functionality.

[codecov]

Codecov Report

Merging #48 (48f485d) into main (4d01770) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #48   +/-   ##
=======================================
  Coverage   87.00%   87.00%           
=======================================
  Files           6        6           
  Lines         331      331           
=======================================
  Hits          288      288           
  Misses         43       43           

Impacted Files	Coverage Δ
napari_crop/_function.py	90.65% <ø> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[zoccoler]

Hi all,

I will likely merge this soon because it is just updates in the documentation.
Let me know if anyone has comments on these changes.

Best,
Marcelo