Fix roxygen package doc syntax

[kelly-sovacool]

See r-lib/roxygen2#1491

Checklist

(Strikethrough any points that are not applicable.)

• [ ] Write unit tests for any new functionality or bug fixes.
• [ ] Update docs if there are any API changes:
  • roxygen comments
    - [ ] vignettes
• Update NEWS.md if this includes any user-facing changes.
• The check workflow succeeds on your most recent commit. This is always required before the PR can be merged.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (2f74c5d) 98.26% compared to head (a9bf555) 98.26%.
Report is 8 commits behind head on main.

❗ Current head a9bf555 differs from pull request most recent head e6d5215. Consider uploading reports for the commit e6d5215 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #340   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files          13       13           
  Lines        1155     1155           
=======================================
  Hits         1135     1135           
  Misses         20       20           

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