docs: remove drop=F from slice 📚 #32

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7 errors and 1 warning

--- re-building 'post01_post.qmd' using html

processing vignette 'post01_post.qmd' failed with diagnostics:

processing vignette 'post02_geomsum.qmd' failed with diagnostics:

processing vignette 'post03_compatibility.qmd' failed with diagnostics:

Vignette re-building failed.

Build process failed

Process completed with exit code 1.

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