Update docstring in naturaldelta

[teobucci]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.49%. Comparing base (87666f2) to head (73c7e1b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #242   +/-   ##
=======================================
  Coverage   99.49%   99.49%           
=======================================
  Files          11       11           
  Lines         796      796           
=======================================
  Hits          792      792           
  Misses          4        4           

Flag	Coverage Δ
macos-latest	97.73% <ø> (ø)
ubuntu-latest	97.73% <ø> (ø)
windows-latest	95.97% <ø> (ø)

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[hugovk]

Thanks!